Journal of Low Temperature Physics最新文献_第5页

Design and Development of a 224-pixel TES X-Ray Microcalorimeter System for Microanalysis with STEM 设计和开发用于 STEM 显微分析的 224 像素 TES X 射线微量热仪系统

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-19 DOI: 10.1007/s10909-024-03175-1

Tasuku Hayashi, Rikuta Miyagawa, Yuta Yagi, Keita Tanaka, Ryo Ota, Noriko Y. Yamasaki, Kazuhisa Mitsuda, Keisuke Maehata, Toru Hara

{"title":"Design and Development of a 224-pixel TES X-Ray Microcalorimeter System for Microanalysis with STEM","authors":"Tasuku Hayashi, Rikuta Miyagawa, Yuta Yagi, Keita Tanaka, Ryo Ota, Noriko Y. Yamasaki, Kazuhisa Mitsuda, Keisuke Maehata, Toru Hara","doi":"10.1007/s10909-024-03175-1","DOIUrl":"10.1007/s10909-024-03175-1","url":null,"abstract":"<div>Studies of astromaterials provide valuable insights into the formation and evolution of the solar system. To analyze such astromaterials on a sub-micrometer scale, one of the most useful tools is energy-dispersive X-ray spectroscopy (EDS) in conjunction with scanning transmission electron microscope (STEM). The conventional semiconductor-based EDS system is sometimes insufficient to resolve emission lines at closely adjacent energies. A transition edge sensor (TES) X-ray microcalorimeter is a promising solution to overcome this problem. We developed a 64-pixel TES X-ray microcalorimeter array which had an energy resolution of approximately 7 eV (FWHM) at an energy band from B Kα to Cu Kα. However, the counting rate was only approximately 1000 count/s/array. The distance between the detector and the sample is 30 cm, limited by the stage of the refrigerator. Therefore, an X-ray polycapillary is used to focus the X-ray, which focus size is 5 mm in diameter, resulting in a detection efficiency of only 5%. To increase the effective area, we developed a large size absorber with a large-scale array. A three-dimensional structure was created to fill the dead space between TES pixels. Additionally, an array of 224 elements was made to increase the detection efficiency by a factor of 10. In this paper, we provide more details of design, fabrication process of the overhang absorber, and device performance.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"217 Part 4","pages":"341 - 349"},"PeriodicalIF":1.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737290","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

Theoretical Studies on Off-Axis Phase Diagrams and Knight Shifts in UTe(_2): Tetra-Critical Point, d-Vector Rotation, and Multiple Phases UTe_2$$中的离轴相图和奈特偏移的理论研究：四临界点、d-矢量旋转和多重相位

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-16 DOI: 10.1007/s10909-024-03181-3

Kazushige Machida

{"title":"Theoretical Studies on Off-Axis Phase Diagrams and Knight Shifts in UTe(_2): Tetra-Critical Point, d-Vector Rotation, and Multiple Phases","authors":"Kazushige Machida","doi":"10.1007/s10909-024-03181-3","DOIUrl":"10.1007/s10909-024-03181-3","url":null,"abstract":"<div>Inspired by recent remarkable sets of experiments on UTe(_2): discoveries of the fourth horizontal internal transition line running toward a tetra-critical point (TCP) at H = 15 T, the off-axis high-field phases, and abnormally large Knight shift (KS) drop below (T_textrm{c}) for (H parallel a)-magnetic easy axis, we advance further our theoretical work on the field (H)-temperature (T) phase diagram for (H parallel b)-magnetic hard axis which contains a positive sloped (H_textrm{c2}) departing from TCP. A nonunitary spin-triplet pairing with three components explains these experimental facts simultaneously and consistently by assuming that the underlying normal electron system with a narrow bandwidth characteristic to the Kondo temperature (sim)30 K unsurprisingly breaks the particle-hole symmetry. This causes a special invariant term in Ginzburg–Landau (GL) free energy functional which couples directly with the 5f magnetic system, giving rise to the (T_textrm{c}) splitting and ultimately to the positive sloped (H_textrm{c2}) and the horizontal internal transition line connected to TCP. The large KS drop can be understood in terms of this GL invariance whose coefficient is negative and leads to a diamagnetic response where the Cooper pair spin is antiparallel to the applied field direction. The present scenario also accounts for the observed d-vector rotation phenomena and off-axis phase diagrams with extremely high (H_textrm{c2}) (gtrsim)70 T found at angles in between the b- and c-axes and between the bc-plane and a-axis, making UTe(_2) a fertile playground for a possible topological superconductor.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"216 5-6","pages":"746 - 788"},"PeriodicalIF":1.1,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-024-03181-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141717193","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

The Gor’kov–Teitel’baum Thermal Activation Model for Cuprates: A Review 铜氧化物的 Gor'kov-Teitel'baum 热活化模型：回顾

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-09 DOI: 10.1007/s10909-024-03188-w

Navinder Singh

引用次数: 0

Modification of the Metallic Magnetic Calorimeter Fabrication Process for High Production Yield 改进金属磁性量热计制造工艺以提高产量

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-09 DOI: 10.1007/s10909-024-03178-y

J. W. Song, S. G. Kim, H. S. Kim, H. J. Kim, M. K. Lee

{"title":"Modification of the Metallic Magnetic Calorimeter Fabrication Process for High Production Yield","authors":"J. W. Song, S. G. Kim, H. S. Kim, H. J. Kim, M. K. Lee","doi":"10.1007/s10909-024-03178-y","DOIUrl":"https://doi.org/10.1007/s10909-024-03178-y","url":null,"abstract":"We have modified the fabrication processes of metallic magnetic calorimeters (MMCs) to improve production yield. Key modifications include (i) the stress mitigation of the sputtered Nb film by optimizing the Argon deposition gas pressure, (ii) an optimized SiO(_{hbox {x}}) insulator layer fabrication by switching from a lift-off to a wet-etching method and controlling the optimizing the temperature, (iii) the joint electroplating of thick gold structures for persistent current switch leads and a thermalization layer, and (iv) a reduced sputter-deposition time of the Ag:Er sensor material by introducing a new wafer holder. These modifications contribute to increased production yield, reduced fabrication time, and enhanced overall performance. Tests on MMCs fabricated with these modifications demonstrated uniformly improved critical current of the Nb meander coils, enhanced SiO(_{hbox {x}}) insulation properties, strengthened persistent current switch systems, and reduced probability of Ag:Er oxidation. These modified MMC detectors also functioned well in tests for alpha spectrometry measurements, demonstrating good performance.","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"22 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567206","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

Annealing Effects and Insulator-to-Metal Transition in Nb Doped Sr2IrO4 掺铌 Sr2IrO4 中的退火效应和绝缘体到金属的转变

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-08 DOI: 10.1007/s10909-024-03186-y

Hui Huang, Bingzheng Wang, Senlin Zhao, Hui Han, Junfeng Wang, Hao Zu

引用次数: 0

Quasiparticle Cooling, Scattering, and Diffusion Simulations in 1D 一维准粒子冷却、散射和扩散模拟

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-05 DOI: 10.1007/s10909-024-03179-x

Soren Ormseth, Peter Timbie, David Harrison, Robert McDermott, Emily Barrentine, Thomas Stevenson, Eric Switzer, Carrie Volpert

{"title":"Quasiparticle Cooling, Scattering, and Diffusion Simulations in 1D","authors":"Soren Ormseth, Peter Timbie, David Harrison, Robert McDermott, Emily Barrentine, Thomas Stevenson, Eric Switzer, Carrie Volpert","doi":"10.1007/s10909-024-03179-x","DOIUrl":"https://doi.org/10.1007/s10909-024-03179-x","url":null,"abstract":"Kinetic Inductance Detectors (KIDs) are an emerging technology useful for a wide variety of astronomy applications, including the Habitable Exoplanet Imaging Mission (HabEx), the Origins Space Telescope (OST), the Probe of Inflation and Cosmic Origins (PICO), and more. KIDs operate at cryogenic temperatures and can detect photons with high accuracy, sensitivity, and over a wide range of wavelengths. Though many KID models describe their performance well under certain operating conditions, some important pieces of physics related to quasiparticle dynamics are not yet either well understood or integrated into these models and can strongly affect device performance. In this paper we describe our framework for building an extended KID model, present the results of a quasiparticle diffusion simulation that incorporates scattering, cooling and diffusion, and discuss plans for the experimental testing of the model. We also discuss additional features to be added into future models that aim to capture a wide variety of potential scenarios encountered by researchers.\u0000","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"29 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548528","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

Cross-Coupling First-Order Gradient Superconducting Quantum Interference Device for Current Sensing 用于电流感应的交叉耦合一阶梯度超导量子干涉装置

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-04 DOI: 10.1007/s10909-024-03182-2

Qing Chen, Qing Zhong, Wei Li, Wenhui Cao, Jinjin Li, Jianting Zhao, Da Xu

{"title":"Cross-Coupling First-Order Gradient Superconducting Quantum Interference Device for Current Sensing","authors":"Qing Chen, Qing Zhong, Wei Li, Wenhui Cao, Jinjin Li, Jianting Zhao, Da Xu","doi":"10.1007/s10909-024-03182-2","DOIUrl":"10.1007/s10909-024-03182-2","url":null,"abstract":"<div>High sensitivity and low noise of superconducting quantum interference devices make them ideal for reading the minute changes in resistance of a transition-edge sensor, which occurs when it absorbs energy or power. A series of first-order gradient, cross-coupling octagonal SQUIDs specifically tailored for use in TES were developed and fabricated for the advantage of lower parasitic capacitance compared with the overlap-coupling ones. It is obtained that a lower screening parameter and increased shunt resistance per junction lead to a higher flux-to-voltage transfer coefficient. This enhancement significantly boosts detection sensitivity and effectively minimizes noise contributions from electronics operating at room temperature. The low-temperature measurement results of the sample with an input coil of 3.5 turns indicate that a small device current white noise of 4.8 pA/√Hz, a device flux white noise of 1.1 μΦ0/√Hz, and an optimal flux-to-voltage transfer coefficient of 338.2 μV/Φ0 are achieved. The bandwidth of a SQUID current sensor with a smaller inductance of the input coil and a larger shunt resistance exceeds 10 MHz. SQUID current sensors, featuring octagonal structures with the first-order gradient cross-coupling, exhibit low flux noise, low current noise, and a high flux-to-voltage transfer coefficient, which can satisfy the requirements of TES applications.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"216 3-4","pages":"643 - 655"},"PeriodicalIF":1.1,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548527","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

Low Working Temperature of Erbium Orthophosphate ErPO4 with Large Magnetocaloric Effect 具有大磁致效应的正磷酸铒 ErPO4 的低工作温度

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-04 DOI: 10.1007/s10909-024-03183-1

Assaad Elouafi, Sara Ezairi, Fatima Lmai, Abdeslam Tizliouine

引用次数: 0

Study of the Magnetocaloric Effect and Critical Behavior in Double Perovskite Manganese Oxides Pr1.5A0.5Mn2O6 (A = Mg, Ba) 双包晶锰氧化物 Pr1.5A0.5Mn2O6 (A = Mg, Ba) 中的磁ocaloric 效应和临界行为研究

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-02 DOI: 10.1007/s10909-024-03184-0

Huiqin Yun, Ze Li, Xiang Jin, Jianjun Zhao, Jingshun Liu

{"title":"Study of the Magnetocaloric Effect and Critical Behavior in Double Perovskite Manganese Oxides Pr1.5A0.5Mn2O6 (A = Mg, Ba)","authors":"Huiqin Yun, Ze Li, Xiang Jin, Jianjun Zhao, Jingshun Liu","doi":"10.1007/s10909-024-03184-0","DOIUrl":"10.1007/s10909-024-03184-0","url":null,"abstract":"<div>In this study, polycrystalline samples of Pr2Mn2O6 (parent phase) and Pr1.5A0.5Mn2O6 (A = Mg, Ba) were prepared using the high-temperature solid-phase reaction method. The effects of Mg and Ba doping on magnetocaloric properties and critical behavior of the parent phase were systematically investigated. Under a magnetic field of 7 T, the relative cooling power (RCP) values of Pr2Mn2O6, Pr1.5Mg0.5Mn2O6, and Pr1.5Ba0.5Mn2O6 were approximately 483.46 J·kg−1, 428.22 J·kg−1, and 479.88 J·kg−1, respectively. The critical behavior analysis revealed that the parent phase showed short-range exchange interactions, while Pr1.5A0.5Mn2O6 (A = Mg, Ba) exhibited long-range exchange interactions. The temperature dependence of the order parameter n was studied under different magnetic fields, confirming the phase transition types and validating the accuracy of the critical exponents obtained. The research findings suggest that both the parent phase and Ba-doped ceramics at the A-site hold promise as magnetic refrigeration materials.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"216 3-4","pages":"499 - 512"},"PeriodicalIF":1.1,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522835","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

Design Considerations for the Optimization of $$lambda$$ -SQUIDs 优化 $$lambda$$ -SQUID 的设计考虑因素

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-07-01 DOI: 10.1007/s10909-024-03180-4

Constantin Schuster, Sebastian Kempf

引用次数: 0