Journal of Low Temperature Physics最新文献_第4页

Study of Exchange Bias Effect in LaCr1−xRuxO3 (0 ≤ x ≤ 0.3) LaCr1−xRuxO3（0≤x≤0.3）交换偏置效应的研究

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-07-14 DOI: 10.1007/s10909-026-03450-3

Biswajit Dalal, Babusona Sarkar

{"title":"Study of Exchange Bias Effect in LaCr1−xRuxO3 (0 ≤ x ≤ 0.3)","authors":"Biswajit Dalal, Babusona Sarkar","doi":"10.1007/s10909-026-03450-3","DOIUrl":"10.1007/s10909-026-03450-3","url":null,"abstract":"<div>The interfacial exchange interaction is key to realize exchange bias (EB) phenomenon in materials consisting of two different magnetic phases, which have immense applications in modern era technological development. LaCrO3 (LCO) is an antiferromagnetic (AFM) oxide, which could be utilized to perceive near room-temperature exchange bias phenomenon. In this work, we report an experimental investigation on the structural, magnetic and dielectric properties of LaCr1−xRuxO3 (0 ≤ x ≤ 0.3) through x-ray diffraction, x-ray photoelectron spectroscopy and temperature- and field-dependent magnetization and dielectric measurements. All samples are found to be crystallized in the orthorhombic structure with space group Pnma, and cell volume reveals a usual ionic radius related enhancement due to Ru4+ ion doping. The AFM transition of pure LCO is modified to ferromagnetic-like (FM-like) transition; while, transition temperature continuously decreases with increase in Ru doping concentration. Magnetization measurements indicate the formation of ferromagnetic cluster-glass state in x = 0.2 sample. We find that a tenfold increase in coercivity value for x = 0.1 as compared to x = 0, suggesting the evolution of moderate FM component. Interestingly, complex interfacial exchange interaction between host AFM matrix of LCO and induced FM phase leads to a significant EB phenomenon in the doped samples. The values of (left|{H}_{EB}right|) are found to be 2.61 kOe and 1.62 kOe at 200 K for x = 0.1 and x = 0.2, respectively. Moreover, EB effect can be tuned by varying the concentration of Ru dopants in LCO, which is fascinating from technological perspectives.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-Plane Field-Direction Control of Multiple-Q States and Skyrmion Crystals in a Triangular-Lattice Magnet with (D_{textrm{3d}}) Anisotropy 具有(D_{textrm{3d}})各向异性的三角形晶格磁体中多q态和Skyrmion晶体的面内场方向控制

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-07-13 DOI: 10.1007/s10909-026-03442-3

Satoru Hayami

{"title":"In-Plane Field-Direction Control of Multiple-Q States and Skyrmion Crystals in a Triangular-Lattice Magnet with (D_{textrm{3d}}) Anisotropy","authors":"Satoru Hayami","doi":"10.1007/s10909-026-03442-3","DOIUrl":"10.1007/s10909-026-03442-3","url":null,"abstract":"<div>We investigate multiple-Q magnetic states in a triangular-lattice spin model with a (D_{textrm{3d}})-type anisotropic interaction under in-plane magnetic fields. Focusing on the interplay between anisotropy and field orientation, we examine how the magnetic phases evolve when the field is applied along two inequivalent in-plane directions. By means of simulated annealing, we identify a wide variety of field-induced phases, including both topological and non-topological multiple-Q states. In the strong-anisotropy regime, the skyrmion crystal with a higher topological number of two, stabilized at zero field, is transformed into the conventional skyrmion crystal with a topological number of one under increasing magnetic field. This transition occurs without a change in the principal ordering wave vectors, indicating that a subtle reorganization of the triple-Q components governs the change in topology. In contrast, in the weak-anisotropy regime, the magnetic behavior is sensitive to the direction of the applied magnetic field. The system eventually selects a single-Q state for the x-directional magnetic field, while it continues to reside within the multiple-Q states, exhibiting several distinct triple-Q states characterized by different intensity distributions among the symmetry-related ordering wave vectors for the y-directional magnetic field. These results demonstrate that the direction of an in-plane magnetic field plays an active role in selecting competing magnetic states, not only modifying phase boundaries but also controlling the topology and internal structure of the spin textures. Our findings highlight a route to manipulate multiple-Q states in centrosymmetric magnets through the combined effect of anisotropic interactions and field orientation.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transmissibility-Based Transfer Path Analysis of a Cryostat Interface for the CUPID Experiment 基于透射率的低温恒温器界面传输路径分析

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-07-13 DOI: 10.1007/s10909-026-03440-5

Serena D’Eramo, Jacopo Brunetti, Antonio D’Addabbo, Walter D’Ambrogio

{"title":"Transmissibility-Based Transfer Path Analysis of a Cryostat Interface for the CUPID Experiment","authors":"Serena D’Eramo, Jacopo Brunetti, Antonio D’Addabbo, Walter D’Ambrogio","doi":"10.1007/s10909-026-03440-5","DOIUrl":"10.1007/s10909-026-03440-5","url":null,"abstract":"<div>The CUPID (CUORE Upgrade with Particle IDentification) experiment searches for neutrinoless double beta decay using cryogenic detectors operating at milli-Kelvin temperatures. These systems are highly sensitive to mechanical vibrations introduced by cryocoolers, which can deteriorate calorimetric performance. In this work, we present the application of transmissibility-based Transfer Path Analysis (TPA) to a test cryostat devoted to CUPID. The method allows estimation of vibration transfer at structural interfaces without requiring force measurements, which are often impractical in cryogenic environments. Numerical simulations were performed at the 300 K plate interface using finite element models and component substructuring. The responses computed using transmissibility-based TPA showed excellent agreement with harmonic response simulations, validating the approach. This study establishes the basis for extending the methodology to colder stages (35 K, 3.5 K), where vibration coupling is more critical. Beyond validating the method, the results provide new insights into the dominant transfer paths at room temperature, thereby supporting the design of improved vibration isolation strategies for next-generation cryogenic detectors.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-026-03440-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ground States of a Rotating Spin-1 Bose-Einstein Condensate in Box Trap 箱形阱中自旋为1的玻色-爱因斯坦凝聚体的基态

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-07-12 DOI: 10.1007/s10909-026-03441-4

Qing-Li Zhu, Ji-Mei Shen

引用次数: 0

Quantum multiparameter estimation of temperature and Coulomb interaction in coupled double quantum dots 耦合双量子点中温度和库仑相互作用的量子多参数估计

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-07-01 DOI: 10.1007/s10909-026-03437-0

Abderrahim Benaoum, Brahim Adnane, Younes Moqine, Aziz Khribach, Rachid Houça

{"title":"Quantum multiparameter estimation of temperature and Coulomb interaction in coupled double quantum dots","authors":"Abderrahim Benaoum, Brahim Adnane, Younes Moqine, Aziz Khribach, Rachid Houça","doi":"10.1007/s10909-026-03437-0","DOIUrl":"10.1007/s10909-026-03437-0","url":null,"abstract":"<div>We study the quantum metrological properties of two coupled double quantum dots, where coherent tunneling and Coulomb interaction jointly govern the system dynamics. Using the quantum Fisher information framework, we evaluate the ultimate precision limits for estimating the interaction strength and temperature. We compare simultaneous and independent estimation strategies and show that parameter correlations strongly influence the achievable precision. In the simultaneous scheme, correlations may induce near-singular behavior of the quantum Fisher information matrix, leading to pronounced precision degradation in specific parameter regions. By contrast, independent estimation yields a more stable and robust precision profile. A quantitative comparison between the two strategies identifies the regimes where each approach is advantageous. Our results demonstrate that the metrological performance of coupled quantum dots is determined not only by intrinsic quantum sensitivity but also by interaction-induced correlations, providing guidance for optimizing quantum sensing protocols in solid-state nanoscale systems.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic Density of States in Nonsymmorphic PdSb(_2) 非对称PdSb中态的电子密度(_2)

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-06-30 DOI: 10.1007/s10909-026-03424-5

Raquel Sánchez-Barquilla, Pablo García Talavera, Jose Antonio Moreno, Óscar Bou Marqués, Edwin Herrera Vasco, Víctor Barrena, Nathanael Batista, Wendel Paz, Juan José Palacios, Federico Mompeán, Mar García Hernández, Isabel Guillamón, Hermann Suderow

{"title":"Electronic Density of States in Nonsymmorphic PdSb(_2)","authors":"Raquel Sánchez-Barquilla, Pablo García Talavera, Jose Antonio Moreno, Óscar Bou Marqués, Edwin Herrera Vasco, Víctor Barrena, Nathanael Batista, Wendel Paz, Juan José Palacios, Federico Mompeán, Mar García Hernández, Isabel Guillamón, Hermann Suderow","doi":"10.1007/s10909-026-03424-5","DOIUrl":"10.1007/s10909-026-03424-5","url":null,"abstract":"<div>PdSb(_2) is a metal in which band structure calculations suggest the presence of sixfold-degenerate fermions. Surface bands emerging from the sixfold-degenerate point may exhibit nontrivial topological properties. Here, we present Scanning Tunneling Microscopy (STM) measurements of PdSb(_2) between 4.2 and 60 K and under magnetic fields up to 14 T. We identify a gap-like feature with a width of approximately 20 meV around the Fermi level. We additionally provide Density Functional Theory (DFT) calculations and discuss the possible connection between the observed tunneling conductance and the surface band structure. We find a small incomplete gap-like feature in the density of states which has a similar size as the feature observed in the experiment but is located slightly above the Fermi level. We furthermore estimate surface relaxation of atomic positions and find that Sb suffers larger relaxations than Pd atoms. This could influence the position in energy of the features found in the band structure. Our measurements show that PdSb(_2) is a good metal, with a density of states which presents, however, interesting features close to the Fermi level.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-026-03424-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-Temperature Thermal Expansion of Polylactic Acid 聚乳酸的低温热膨胀

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-06-30 DOI: 10.1007/s10909-026-03434-3

J. Vian-Reagan, D. N. Eiteneer, M. W. Ray

引用次数: 0

Low-Temperature Transport and Resistivity Upturn in Electron-Doped La0.9Zr0.1MnO3 Interplay of Kondo Effect and Electron–Electron Scattering 电子掺杂La0.9Zr0.1MnO3的低温输运和电阻率上升近道效应与电子-电子散射的相互作用

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-06-29 DOI: 10.1007/s10909-026-03436-1

Abid Ahmad, Irshad Bhat, Lila Abdulaziz AlKhtaby, Bilal Ahmad Reshi

{"title":"Low-Temperature Transport and Resistivity Upturn in Electron-Doped La0.9Zr0.1MnO3 Interplay of Kondo Effect and Electron–Electron Scattering","authors":"Abid Ahmad, Irshad Bhat, Lila Abdulaziz AlKhtaby, Bilal Ahmad Reshi","doi":"10.1007/s10909-026-03436-1","DOIUrl":"10.1007/s10909-026-03436-1","url":null,"abstract":"<div>Low-temperature electronic transport properties of electron-doped La0.9Zr0.1MnO3 manganite systems have been reported. The temperature-dependent resistivity results exhibit metal to insulator transition (MIT). Three independent MI transitions are observed throughout the studied temperature range (4K–300K). In this study, we focused on the third transition (resistivity upturn) occurring at a relatively low temperature of approximately 48K (see Fig. 1). The other two transitions occurring at higher temperature have been reported elsewhere. The resistivity versus temperature measurements under zero applied magnetic field exhibit an upturn at very low-temperature Tmin~48(K) and the transition temperature shifts towards lower temperature under applied magnetic field. The observed phase transition at such a low temperature has been studied qualitatively and quantitatively using spin-dependent Kondo and e-e scattering models independently. It was concluded that neither of the two independent models fits the observed data satisfactorily. However, the simultaneous contribution of both the models however demonstrated better fitting and is consistent with the experimental results. Controlling phase transitions at low temperatures enables the development of advanced electronic and quantum devices, including transistors, memory units, sensors, switches, and quantum computing components.<div><figure><div><div><picture><source><img></source></picture></div><div>The temperature dependence of resistivity (ρ) for La0.9Zr0.1MnO3 system under different magnetic fields. The arrow indicates the position of the resistivity minimum at temperature Tmin. TP1, TP2 and T1 correspond to MITs reported in [1]. The dashed lines are guidelines for eyes</div></div></figure></div></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superconducting NbN Resonator Parametric Amplifiers for Millimetre Wavelengths 毫米波超导NbN谐振腔参量放大器。

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-06-29 DOI: 10.1007/s10909-026-03432-5

Songyuan Zhao, S. Withington, C. N. Thomas

{"title":"Superconducting NbN Resonator Parametric Amplifiers for Millimetre Wavelengths","authors":"Songyuan Zhao, S. Withington, C. N. Thomas","doi":"10.1007/s10909-026-03432-5","DOIUrl":"10.1007/s10909-026-03432-5","url":null,"abstract":"<div>We report the development of a reactive sputtering process for high (T_textrm{c}) NbN films with high normal-state resistivity, tailored for kinetic inductance parametric amplifiers. The process includes precise control to ensure full nitridation of the target prior to deposition. Under optimised conditions, the resulting NbN thin films exhibit a critical temperature of (10.5,textrm{K}) and a resistivity of (sim 1000,mathrm {mu Omega ,cm}). The high (T_textrm{c}) of the NbN thin films suggests strong potential for application over the entire millimetre-wave frequency range from 24 to (300,textrm{GHz}), whereas the high resistivity suggests a reduced power requirement for the pump tone to achieve high gain. Resonator parametric amplifiers have been fabricated from these films using coplanar waveguide geometry. The devices were able to produce high gain exceeding (20,textrm{dB}) at (25,textrm{GHz}), with artefact-free, reproducible amplification profiles in good agreement with theoretical models.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13314705/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving Magneto-Transport Properties of YBCO via Inclusion of Gallium Oxide Nanorods 用氧化镓纳米棒包合改善YBCO的磁输运性能

IF 1.2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2026-06-28 DOI: 10.1007/s10909-026-03435-2

Sandeep Kumar, Rajni Kandari, Neeraj Khare

{"title":"Improving Magneto-Transport Properties of YBCO via Inclusion of Gallium Oxide Nanorods","authors":"Sandeep Kumar, Rajni Kandari, Neeraj Khare","doi":"10.1007/s10909-026-03435-2","DOIUrl":"10.1007/s10909-026-03435-2","url":null,"abstract":"<div>The magneto-transport properties of Ga2O3 nanorod-added YBa2Cu3O7-δ (YBCO) nanocomposites with Ga2O3 concentrations varying from 0 to 0.5 wt% are systematically investigated. The incorporation of Ga2O3 nanorods in YBCO matrix reduces the superconducting transition width (ΔT), indicating improved grain connectivity in the nanocomposite samples compared to pristine YBCO. Analysis based on thermally activated flux flow (TAFF) reveals an enhancement of the activation energy (U0) by nearly 35%, suggesting stronger vortex pinning after nanorod addition. Furthermore, Ginzburg–Landau analysis shows that the resistive upper critical field Hc2(0) increases from ~ 178 T for pure YBCO to ~ 231 T for the nanocomposite samples. The field dependence of U0 indicates that the dominant pinning mechanism remains unchanged, while the improved superconducting performance originates from defect structures introduced by the Ga2O3 nanorods, which act as effective flux-pinning centers. Overall, the results demonstrate that the incorporation of Ga2O3 nanorods effectively enhances the high-field magneto-transport performance of YBCO nanocomposites.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"222 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148381048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0