Journal of Low Temperature Physics最新文献_第2页

Some Thermomechanical Properties of an FCC Helium Cryocrystal FCC氦晶体的一些热力学性质

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-06 DOI: 10.1007/s10909-025-03276-5

Hoc Quang Nguyen, Dat Xuan Hua, Linh Thi Mai Le, En Hai Le, Loan Thi Hoang, Nhung Le Hoang, Phuc Van Tran

引用次数: 0

Insights into Magnetic Properties of an Ising Nanoisland with Four-Spin and Next-Nearest Neighbor Interactions 透视具有四针和近邻相互作用的等效纳米岛的磁特性

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-05 DOI: 10.1007/s10909-025-03278-3

M. Mouhib, A. El Fadl, S. Bri, MD. Belrhiti, H. Mounir

{"title":"Insights into Magnetic Properties of an Ising Nanoisland with Four-Spin and Next-Nearest Neighbor Interactions","authors":"M. Mouhib, A. El Fadl, S. Bri, MD. Belrhiti, H. Mounir","doi":"10.1007/s10909-025-03278-3","DOIUrl":"10.1007/s10909-025-03278-3","url":null,"abstract":"<div>We propose a multi-spin Ising model to report a computational study of a mixed spin-1 and spin-1/2 ferrimagnetic nanoisland. Employing the finite cluster approximation (FCA), we thoroughly examine how the four-spin interaction, next-nearest neighbor interaction, and crystal field affect the phase diagrams and the magnetic properties including magnetizations, internal energy, and specific heat. The exact calculations derived from the Hamiltonian at the ground state (T = 0) reveal the existence of a critical equation, J′ + J4 = − 4Js delimiting two distinct ground states (I) and (II). Phase diagrams analysis shows that the transition temperature Tc trends toward a tricritical point as the four-spin interaction J4 varies, without evidence of compensation phenomena; while the next-nearest neighbor interaction J' leads to the manifestation of compensation points only if J′ surpasses a Js-dependent threshold value. Interestingly, when the crystal field DS is inserted, one, two, or three compensation points may emerge according to the strength of J′.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 1-2","pages":"43 - 58"},"PeriodicalIF":1.1,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784084","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

Density of States of the Hubbard Model Supplemented with the Quantizing Magnetic Field 外加量子化磁场的Hubbard模型的态密度

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-05 DOI: 10.1007/s10909-025-03280-9

Alexei Sherman

{"title":"Density of States of the Hubbard Model Supplemented with the Quantizing Magnetic Field","authors":"Alexei Sherman","doi":"10.1007/s10909-025-03280-9","DOIUrl":"10.1007/s10909-025-03280-9","url":null,"abstract":"<div>Using the strong coupling diagram technique, we calculate the zero-temperature density of states (rho) of electrons on a square lattice immersed in a perpendicular uniform magnetic field. The electrons are described by Hubbard Hamiltonian. For moderate doping, Landau subbands are observed for small Hubbard repulsions U only. For larger U, the subbands are blurred. Instead, small peaks varying with the field induction B arise by opening the Mott gap in its vicinity. The related variation of (rho) with 1/B may be connected with the low-frequency quantum oscillations in lightly doped cuprates. For all considered repulsions, (rho) has gaps near transfer frequencies of the Hubbard atom, (-mu) and (U-mu), with (mu) the chemical potential. In the heavily underdoped case (mu <0), Landau subbands are grouped into the lower and upper Hubbard subbands for moderate and large repulsions. The intensity of the upper Hubbard subband decreases with approaching the Fermi level to the lower edge of the spectrum and finally vanishes.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 1-2","pages":"59 - 76"},"PeriodicalIF":1.1,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784083","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

The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance MISTRAL仪器的低温系统：设计和实验室性能

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-13 DOI: 10.1007/s10909-024-03263-2

A. Coppolecchia, A. Carbone, G. D’ Alessandro, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti, V. Capalbo, E. Carretti, D. Ciccalotti, F. Columbro, A. Cruciani, M. De Petris, F. Govoni, G. Isopi, L. Lamagna, E. Levati, P. Marongiu, A. Mascia, S. Masi, E. Molinari, M. Murgia, A. Navarrini, A. Novelli, A. Occhiuzzi, A. Orlati, A. Paiella, E. Pappalardo, G. Pettinari, F. Piacentini, T. Pisanu, S. Poppi, I. Porceddu, A. Ritacco, M. R. Schirru, G. Vargiu

{"title":"The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance","authors":"A. Coppolecchia, A. Carbone, G. D’ Alessandro, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti, V. Capalbo, E. Carretti, D. Ciccalotti, F. Columbro, A. Cruciani, M. De Petris, F. Govoni, G. Isopi, L. Lamagna, E. Levati, P. Marongiu, A. Mascia, S. Masi, E. Molinari, M. Murgia, A. Navarrini, A. Novelli, A. Occhiuzzi, A. Orlati, A. Paiella, E. Pappalardo, G. Pettinari, F. Piacentini, T. Pisanu, S. Poppi, I. Porceddu, A. Ritacco, M. R. Schirru, G. Vargiu","doi":"10.1007/s10909-024-03263-2","DOIUrl":"10.1007/s10909-024-03263-2","url":null,"abstract":"<div>We describe the design and performance of the cryostat and the multi-stage sub-K single-shot sorption cooler for the MIllimeter Sardinia Radio Telescope Receiver based on Array of Lumped elements kids (MISTRAL) experiment. MISTRAL is a W-band (77 - 103 GHz) Ti/Al bi-layer Lumped Elements Kinetic Inductance Detectors (LEKIDs) camera working at the Gregorian focus of the 64 m aperture Sardinia Radio Telescope (SRT), located in Sardinia (Italy). The cryogenic system, based on a 1.5 W at 4.2 K Pulse Tube (PT) cryocooler, provides the 4 K base temperature for the sub-K refrigerator, and cools down the cold optics and the filters chain of the instrument. The sub-K sorption cooler consists of two intermediate stages, (^{4})He and (^{3})He sorption refrigerators that allow to reduce the heat load on the ultra-cold head, and a twin stage of (^{3})He sorption refrigerator providing the 0.2 K operation temperature for the 415-pixel array of LEKIDs. MISTRAL experiment was installed at SRT in May 2023, the technical commissioning started in June 2023. We will show the performance of the system in the laboratory.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 5-6","pages":"335 - 346"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-024-03263-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513291","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

A Low Background Setup for Low Energy X-ray Detection in the Context of the BabyIAXO/IAXO Axion Searches 在BabyIAXO/IAXO轴子搜索的背景下，低能x射线探测的低背景设置

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-11 DOI: 10.1007/s10909-025-03274-7

M. Loidl, E. Ferrer-Ribas, L. Gastaldo, Arshjot Kaur, S. Kempf, X.-F. Navick, M. Rodrigues, M. L. Zahir

引用次数: 0

Study of the T-Linear Resistivity in the Strange Metal Phase of the Hole-Doped Cuprate Superconductors 掺空穴铜超导体奇异金属相的t线电阻率研究

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-10 DOI: 10.1007/s10909-025-03266-7

Ling Qin, Minghuan Zeng

引用次数: 0

Aluminum Goalpost Nano-mechanical Devices at Low Temperatures 低温铝门柱纳米机械装置

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-08 DOI: 10.1007/s10909-025-03271-w

Baptiste Alperin, Ilya Golokolenov, Gwénaëlle Julié, Bruno Fernandez, Andrew Fefferman, Eddy Collin

{"title":"Aluminum Goalpost Nano-mechanical Devices at Low Temperatures","authors":"Baptiste Alperin, Ilya Golokolenov, Gwénaëlle Julié, Bruno Fernandez, Andrew Fefferman, Eddy Collin","doi":"10.1007/s10909-025-03271-w","DOIUrl":"10.1007/s10909-025-03271-w","url":null,"abstract":"<div>Mechanical objects have been widely used at low temperatures for decades, for various applications; from quantum fluids sensing with vibrating wires or tuning forks, to torsional oscillators for the study of mechanical properties of glasses, and finally micro and nano-mechanical objects with the advent of clean room technologies. These small structures opened up new possibilities to experimentalists, thanks to their small size. We report on the characterization of purely metallic goalpost nano-mechanical structures, which are employed today for both quantum fluids studies (especially quantum turbulence in (^4)He, (^3)He) and intrinsic friction studies (Two-level-systems unraveling). Extending existing literature, we demonstrate the analytic modeling of the resonances, in good agreement with numerical simulations, for both first and second mechanical modes. Especially, the impact of the curvature of the whole structure (and therefore, in-built surface stress) is analyzed, together with nonlinear properties. We demonstrate that these are of geometrical origin and device-dependent. Motion and forces are expressed in meters and Newtons experienced at the level of the goalpost’s paddle, for any magnitude or curvature, which is of particular importance for quantum fluids and solids studies.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 5-6","pages":"396 - 413"},"PeriodicalIF":1.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513361","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

Magnetic and Magnetocaloric Effects and Phase Transition Critical Behavior of Dy-Doped La0.7Ca0.3MnO3 dy掺杂La0.7Ca0.3MnO3的磁性和磁热效应及相变临界行为

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-07 DOI: 10.1007/s10909-025-03272-9

Qi Li, Huaijin Ma, Jiawei Xu, Jianjun Zhao, Lei Gao, Xiang Jin

{"title":"Magnetic and Magnetocaloric Effects and Phase Transition Critical Behavior of Dy-Doped La0.7Ca0.3MnO3","authors":"Qi Li, Huaijin Ma, Jiawei Xu, Jianjun Zhao, Lei Gao, Xiang Jin","doi":"10.1007/s10909-025-03272-9","DOIUrl":"10.1007/s10909-025-03272-9","url":null,"abstract":"<div>In this study, polycrystalline samples of La0.7Ca0.3-xDyxMnO3 (x = 0, 0.15) were synthesized via the solid-state reaction method. Their structures, magnetic properties, magnetocaloric effects, and critical behaviors associated with phase transitions were systematically investigated. All samples exhibited structures belonging to the Pbnm space group, characterized by precise compositions and good single-phase. The samples underwent paramagnetic-ferromagnetic (PM-FM) phase transitions at Curie temperatures (TC) of approximately 244 K for x = 0 and 132 K for x = 0.15. The incorporation of Dy significantly broadened the half height wide temperature range (ΔTFWHM) from 39.36 K (x = 0) to 121.92 K (x = 0.15). Consequently, the relative cooling capacity (RCP) of the samples was markedly increased, rising from 369.76 J·kg−1 (x = 0) to 721.09 J·kg−1 (x = 0.15). Furthermore, upon doping with x = 0.15, the phase transition type shifted from the first-order phase transition (FOPT) of the parent phase to a second-order phase transition (SOPT). This shift is attributed to the substitution of some Ca2+ ions by Dy3+, which weakened the double-exchange interaction and altered the phase transition type. Analysis of the critical behavior using the Kouvel-Fisher (K-F) and Modified Arrott plot (MAP) methods revealed that the critical features of the phase transition in La0.7Ca0.15Dy0.15MnO3 are better described by a Mean-Field Model with long-range ordering. Therefore, this study not only enriches our understanding of the physical properties of this class of materials but also enhances their potential for magnetic refrigeration (MR) applications.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 5-6","pages":"358 - 382"},"PeriodicalIF":1.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513335","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

Benefits of the Use of Monte Carlo Simulations in Cryogenic Detector Design 蒙特卡罗模拟在低温探测器设计中的应用

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-05 DOI: 10.1007/s10909-025-03273-8

Simone Lotti, Matteo D’Andrea, Claudio Macculi, Luigi Piro, Caroline Kilbourne, Dan McCammon, Ralph Kraft

{"title":"Benefits of the Use of Monte Carlo Simulations in Cryogenic Detector Design","authors":"Simone Lotti, Matteo D’Andrea, Claudio Macculi, Luigi Piro, Caroline Kilbourne, Dan McCammon, Ralph Kraft","doi":"10.1007/s10909-025-03273-8","DOIUrl":"10.1007/s10909-025-03273-8","url":null,"abstract":"<div>Monte Carlo simulations represent a useful tool to predict and understand the behavior of X-ray detectors in space and on ground. We made use of the Geant4 software to simulate the performances of several TES detectors. We investigated the performances of the X-IFU CryoAC, a large area TES-based silicon detector in a laboratory environment, and its response to the ground level flux of cosmic muons. We were able to predict the background of the Athena X-IFU instrument (ESA) in the L1 environment for an equivalent time of (sim)100 ks and used the code to investigate the dependence of such a background on possible changes in the geometry such as pixel layout and size. We also compared the results with the ones obtained for the Line Emission Mapper (LEM), a probe concept proposed to NASA that uses a different TES array optimized for higher spectral resolution of lower energy photons, identifying issues with the detector design and indicating possible solutions.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 1-2","pages":"1 - 18"},"PeriodicalIF":1.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03273-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784082","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

Two Formulae for the Determination of the Interspecies Interaction Via a Binary Bose–Einstein Condensates 用二元玻色-爱因斯坦凝聚体测定种间相互作用的两个公式

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-05 DOI: 10.1007/s10909-025-03268-5

Yimin Liu, Yanzhang He, Chengguang Bao

引用次数: 0