arXiv - PHYS - Applied Physics最新文献_第5页

Realization of giant elastocaloric cooling at cryogenic temperatures in TmVO$_4$ via a strain load/unload technique 通过应变加载/卸载技术实现 TmVO$_4$ 低温下的巨弹性冷却

arXiv - PHYS - Applied Physics Pub Date : 2024-09-10 DOI: arxiv-2409.06909

Mark P. Zic, Linda Ye, Maya H. Martinez, Ian R. Fisher

引用次数: 0

Role of Zr in Cu-rich single-phase and nanocomposite Cu-Zr: molecular dynamics and experimental study Zr 在富铜单相和纳米复合铜-Zr 中的作用：分子动力学和实验研究

arXiv - PHYS - Applied Physics Pub Date : 2024-09-10 DOI: arxiv-2409.06582

Jiri Houska, Mariia Zhadko, Radomir Cerstvy, Deepika Thakur, Petr Zeman

引用次数: 0

The nature of silicon PN junction impedance at high frequency 硅 PN 结高频阻抗的性质

arXiv - PHYS - Applied Physics Pub Date : 2024-09-10 DOI: arxiv-2409.06749

David A. van Nijen, Paul Procel, René A. C. M. M. van Swaaij, Miro Zeman, Olindo Isabella, Patrizio Manganiello

引用次数: 0

Optimization of Embedded Element Patterns of Reactively Loaded Antenna Arrays 反应式加载天线阵列嵌入式元件图案的优化

arXiv - PHYS - Applied Physics Pub Date : 2024-09-10 DOI: arxiv-2409.06291

Albert Salmi, Miloslav Capek, Lukas Jelinek, Anu Lehtovuori, Ville Viikari

引用次数: 0

Mimicking synaptic plasticity with wedged Pt/Co/Pt spin-orbit torque device 利用楔形铂/钴/铂自旋轨道力矩装置模拟突触可塑性

arXiv - PHYS - Applied Physics Pub Date : 2024-09-10 DOI: arxiv-2409.06286

Shiwei Chen, Mishra Rahul, Huanjian Chen, Hyunsoo Yang, Xuepeng Qiu

引用次数: 0

Impact of external magnetic fields on STT-MRAM 外部磁场对 STT-MRAM 的影响

arXiv - PHYS - Applied Physics Pub Date : 2024-09-09 DOI: arxiv-2409.05584

Bernard Dieny, Sanjeev Aggarwal, Vinayak Bharat Naik, Sebastien Couet, Thomas Coughlin, Shunsuke Fukami, Kevin Garello, Jack Guedj, Jean Anne C. Incorvia, Laurent Lebrun, Kyung-Jin Lee, Daniele Leonelli, Yonghwan Noh, Siamak Salimy, Steven Soss, Luc Thomas, Weigang Wang, Daniel Worledge

{"title":"Impact of external magnetic fields on STT-MRAM","authors":"Bernard Dieny, Sanjeev Aggarwal, Vinayak Bharat Naik, Sebastien Couet, Thomas Coughlin, Shunsuke Fukami, Kevin Garello, Jack Guedj, Jean Anne C. Incorvia, Laurent Lebrun, Kyung-Jin Lee, Daniele Leonelli, Yonghwan Noh, Siamak Salimy, Steven Soss, Luc Thomas, Weigang Wang, Daniel Worledge","doi":"arxiv-2409.05584","DOIUrl":"https://doi.org/arxiv-2409.05584","url":null,"abstract":"This application note discusses the working principle of spin-transfer torque\u0000magnetoresistive random access memory (STT-MRAM) and the impact that magnetic\u0000fields can have on STT-MRAM operation. Sources of magnetic field and typical\u0000magnitudes of magnetic fields are given. Based on the magnitude of commonly\u0000encountered external magnetic fields, we show below that magnetic immunity of\u0000STT-MRAM is sufficient for most uses once the chip is mounted on a printed\u0000circuit board (PCB) or inserted in its working environment. This statement is\u0000supported by the experience acquired during 60 years of use of magnetic hard\u0000disk drives (HDD) including 20 years of HDD with readers comprising magnetic\u0000tunnel junctions, 20+ years of use of magnetic field sensors as position\u0000encoders in automotive industry and 15+ years of use of MRAM. Mainly during\u0000chip handling does caution need to be exercised to avoid exposing the chip to\u0000excessively high magnetic fields.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Apparatus for producing single strontium atoms in an optical tweezer array 在光学镊子阵列中产生单个锶原子的装置

arXiv - PHYS - Applied Physics Pub Date : 2024-09-09 DOI: arxiv-2409.05361

Kai Wen, Huijin Chen, Xu Yan, Zejian Ren, Chengdong He, Elnur Hajiyev, Preston Tsz Fung Wong, Gyu-Boong Jo

引用次数: 0

Energy Shift with Coupling (ESC): a new quench protection method 带耦合的能量移动（ESC）：一种新的淬火保护方法

arXiv - PHYS - Applied Physics Pub Date : 2024-09-09 DOI: arxiv-2409.05446

Emmanuele Ravaioli, Arjan Verweij, Mariusz Wozniak

{"title":"Energy Shift with Coupling (ESC): a new quench protection method","authors":"Emmanuele Ravaioli, Arjan Verweij, Mariusz Wozniak","doi":"arxiv-2409.05446","DOIUrl":"https://doi.org/arxiv-2409.05446","url":null,"abstract":"Quench protection of full-size high-field accelerator magnets poses\u0000significant challenges. Maintaining the hot-spot temperature and peak\u0000voltage-to-ground within acceptable limits requires a protection system that\u0000quickly transitions most of the coil turns to the normal state. Existing magnet\u0000protection technologies, such as quench protection heaters or the Coupling Loss\u0000Induced Quench system (CLIQ), have been successfully applied. However, they\u0000both present shortcomings since they require either thin insulation between the\u0000heaters and the magnet conductor or direct electrical connections to the magnet\u0000coil. A novel quench protection method, Energy Shift with Coupling (ESC), is\u0000presented which can achieve excellent quench protection performance without the\u0000above-mentioned drawbacks. ESC relies on normal-conducting auxiliary coils\u0000strongly magnetically coupled with the magnet coils to protect. Upon quench\u0000detection capacitive units connected across such coils introduce a high current\u0000change in the auxiliary coils causing a rapid shift of magnet stored energy\u0000from the magnet coils to the auxiliary coils. This has three beneficial\u0000effects: sudden reduction of ohmic loss in the normal zone of the magnet\u0000conductor, introduction of high transient losses in the magnet conductor, thus\u0000causing a quick transition to the normal state, and extraction of a part of the\u0000magnet stored energy to the auxiliary coils. The applicability of the ESC\u0000concept on an existing magnet design is analyzed with electromagnetic and\u0000thermal transient simulations performed with the STEAM-LEDET program. The\u0000advantages and disadvantages of ESC are discussed and compared to other\u0000conventional quench protection methods. Simulation results show that ESC can be\u0000applied to protect full-scale magnets with reasonable requirements in terms of\u0000size and location of the auxiliary coils and of capacitive unit parameters.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localization of macroscopic sources of magnetic field using optical fibers doped with NV-rich sub-micron diamonds and zero-field resonance 利用掺杂富含 NV 的亚微米钻石的光纤和零场共振定位宏观磁场源

arXiv - PHYS - Applied Physics Pub Date : 2024-09-09 DOI: arxiv-2409.05452

Mariusz Mrózek, Adam Filipkowski, Wojciech Gawlik, Ryszard Buczyński, Adam M. Wojciechowski, Mariusz Klimczak

{"title":"Localization of macroscopic sources of magnetic field using optical fibers doped with NV-rich sub-micron diamonds and zero-field resonance","authors":"Mariusz Mrózek, Adam Filipkowski, Wojciech Gawlik, Ryszard Buczyński, Adam M. Wojciechowski, Mariusz Klimczak","doi":"arxiv-2409.05452","DOIUrl":"https://doi.org/arxiv-2409.05452","url":null,"abstract":"We employ an optical fiber doped with randomly oriented fluorescent\u0000sub-micron diamonds and the novel zero-field resonance protocol to collect\u0000information on the localization and orientation of a magnetic-field source and\u0000its distribution. Many previous demonstrations of diamond-based magnetic field\u0000sensing achieved ultrahigh sensitivities down to the fT range warranted by\u0000manipulating spin states of the diamond nitrogen vacancy (NV) centers with\u0000externally applied radio or microwaves. The application of such oscillating\u0000fields is problematic in distributed magnetic-field measurements and may be\u0000incompatible with specific targets. Instead of relying on these approaches, we\u0000leveraged cross-relaxations of particular spin-state populations of the NV\u0000center under a magnetic field, thus observing zero-field resonances and making\u0000external radio frequency fields redundant. Combined with an optical fiber\u0000sensitive to the magnetic field along its entire length, remote sensing was\u0000realized that returned information on the spatial field distribution without\u0000using any moving mechanical elements in the detection system. Variation of the\u0000spatial parameters of the investigated field was achieved simply by controlling\u0000the current in a pair of induction coils easily integrable with optical fibers\u0000without limiting the fiber-specific functionality of the optical readout taking\u0000place at a fixed location at the optical fiber output. Lifting of the\u0000requirements related to the mechanical scanning of the fiber, the application\u0000of external fields, and the orientation of the NV centers against the measured\u0000field mark a very practical step forward in optically driven magnetic field\u0000sensing, not easily achievable with earlier implementations.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Interfacial Oxygen Diffusion on the Magnetic Properties and Thermal Stability of Pd/CoFeB/Pd/Ta Heterostructure 界面氧扩散对 Pd/CoFeB/Pd/Ta 异质结构的磁性能和热稳定性的影响

arXiv - PHYS - Applied Physics Pub Date : 2024-09-09 DOI: arxiv-2409.05783

Saravanan Lakshmanan, Cristian Romanque, Mario Mery, Manivel Raja Muthuvel, Nanhe Kumar Gupta, Carlos Garcia

{"title":"Effects of Interfacial Oxygen Diffusion on the Magnetic Properties and Thermal Stability of Pd/CoFeB/Pd/Ta Heterostructure","authors":"Saravanan Lakshmanan, Cristian Romanque, Mario Mery, Manivel Raja Muthuvel, Nanhe Kumar Gupta, Carlos Garcia","doi":"arxiv-2409.05783","DOIUrl":"https://doi.org/arxiv-2409.05783","url":null,"abstract":"We investigated the effects of annealing temperatures (TA) on a Pd (5\u0000nm)/CoFeB (10 nm)/Pd (3 nm)/Ta (10 nm) multilayer structure. The as-deposited\u0000sample showed an amorphous state with in-plane uniaxial magnetic anisotropy\u0000(UMA), resulting in low coercivity and moderate damping constant ({alpha})\u0000values. Increasing TA led to crystallization, forming bcc-CoFe (110) crystals,\u0000which increased in-plane coercivity and introduced isotropic magnetic\u0000anisotropy, slightly reducing the {alpha}. The two-fold UMA persists up to 600\u0000C, and the thermal stability of the in-plane magnetic anisotropy remains intact\u0000even TA = 700 C. The TA significantly influenced the magnetic properties such\u0000as in-plane saturation magnetization (Ms//), in-plane and out-of-plane\u0000coercivities, and in-plane effective magnetic anisotropy energy density (Keff).\u0000Above 600 C, Keff decreased, indicating a transition towards uniaxial\u0000perpendicular magnetic anisotropy. Interfacial oxidation and diffusion from the\u0000Ta capping layer to the Pd/CoFeB/Pd interfaces were observed, influencing\u0000chemical bonding states. Annealing at 700 C, reduced oxygen within TaOx through\u0000a redox reaction involving Ta crystallization, forming TaB, PdO, and BOx\u0000states. Ferromagnetic resonance spectra analysis indicated variations in\u0000resonance field (Hr) due to local chemical environments. The {alpha}\u0000reduction, reaching a minimum at 300 C annealing, was attributed to reduced\u0000structural disorder from inhomogeneities. Tailoring magnetic anisotropy and\u0000spin dynamic properties in Pd/CoFeB/Pd/Ta structures through TA-controlled\u0000oxygen diffusion/oxidation highlights their potential for SOT, DMI, and\u0000magnetic skyrmion-based spintronic devices.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0