Journal of Applied Physics最新文献_第6页

Influence of local structure and metal-oxygen hybridization on the electrical and magnetic properties of alkaline earth metal (Mg2+, Ca2+, Sr2+) substituted LaFeO3 ceramics 局部结构和金属氧杂化对碱土金属（Mg2+、Ca2+、Sr2+）取代的 LaFeO3 陶瓷的电学和磁学特性的影响

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0222233

Subhajit Nandy, Mya Theingi, Sayan Ghosh, Keun Hwa Chae, C. Sudakar

{"title":"Influence of local structure and metal-oxygen hybridization on the electrical and magnetic properties of alkaline earth metal (Mg2+, Ca2+, Sr2+) substituted LaFeO3 ceramics","authors":"Subhajit Nandy, Mya Theingi, Sayan Ghosh, Keun Hwa Chae, C. Sudakar","doi":"10.1063/5.0222233","DOIUrl":"https://doi.org/10.1063/5.0222233","url":null,"abstract":"Pristine and alkaline-earth metal-substituted LaFeO3 (La1−xAxFeO3−δ; x = 0 and 0.2; A = Mg2+, Ca2+, and Sr2+) sintered ceramics are prepared from nanoparticles synthesized via a low-temperature citrate sol–gel technique. X-ray diffraction studies confirm the formation of a phase-pure LaFeO3 structure without any secondary phases for all the La1−xAxFeO3−δ compositions. LaFeO3 and La0.8Mg0.2FeO3−δ ceramics show Raman active modes related to La vibration, oxygen octahedral tilting, bending, and stretching. The optical bandgap is estimated to be 2.34 eV for pure LaFeO3 and reduces to 2.23 eV for La0.8Mg0.2FeO3−δ ceramics. On the contrary, La0.8Ca0.2FeO3−δ and La0.8Sr0.2FeO3−δ ceramics show no features in Raman spectra, consistent with the observation of metallic nature and diffuse band edge without any indication of sharp band edge noted. X-ray absorption spectroscopy (XAS) studies on La-L3 and Fe-K-edges confirm the oxidation states of La3+ and Fe3+ in all these ceramics. Local structural distortions and formation of oxygen vacancies in La0.8A0.2FeO3−δ (A = Mg2+, Ca2+, and Sr2+) ceramics are discerned from XAS structure analysis compared to the pristine LaFeO3 ceramics. Magnetic measurements of La1−xAxFeO3−δ reveal weak ferromagnetic nature except for La0.8Mg0.2FeO3−δ, which shows a large magnetization of 4.6 (6.7) emu/g at 300 (5) K. The ferromagnetic behavior of La0.8Mg0.2FeO3−δ ceramics seems to originate from the modification of hybridization between Fe(3d)–O(2p), La(5d)–O(2p), and Fe(4sp)–O(2p) orbitals. An anomalous magnetic transition observed only in zero-field-cooled curves at 88 K in La0.8Ca0.2FeO3−δ and La0.8Sr0.2FeO3−δ ceramics is correlated to the formation of new electronic states containing O 2p character as discerned from pre-peak O-K-edge.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"2 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204274","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

Light narrowing over broad temperature range with paraffin-coated vapor cells 使用石蜡涂层蒸发电池在宽温度范围内缩小光照范围

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0230602

Shuyuan Chen, Xingqing Jin, Wentian Xiang, Wei Xiao, Changping Du, Xiang Peng, Hong Guo

{"title":"Light narrowing over broad temperature range with paraffin-coated vapor cells","authors":"Shuyuan Chen, Xingqing Jin, Wentian Xiang, Wei Xiao, Changping Du, Xiang Peng, Hong Guo","doi":"10.1063/5.0230602","DOIUrl":"https://doi.org/10.1063/5.0230602","url":null,"abstract":"This study reports light narrowing in paraffin-coated vapor cells from room temperature 27 to 59 °C, where spin-exchange relaxation is suppressed. By means of a coating lock and eliminating the reservoir effect, an ultra-narrow magnetic resonance linewidth of 0.36 Hz and an atomic coherence lifetime of T2=0.9 s are achieved. In cells free of buffer gas, the narrow linewidth over this broad temperature range is a result of enhanced spin polarization, which is facilitated by the effective suppression of radiation trapping benefiting from the stability of the vapor density. Using such cells in atomic magnetometers, the photon shot noise limit is estimated as 0.2 fT/Hz1/2 and the spin-projection noise limit is estimated as 1.1 fT/Hz1/2. Also, a magnetometer system with the stable coated cell is identified, which demonstrates the potential for achieving relatively stable magnetometer sensitivity without precisely controlling the cell temperature. The long coherence lifetime and the broad operating temperature range expand the potential applications of quantum memory and other quantum sensors such as atomic clocks.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"26 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204277","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

Characterizing polarization switching kinetics of ferroelectric Hf0.5Zr0.5O2 at cryogenic temperature 铁电体 Hf0.5Zr0.5O2 在低温下的极化转换动力学特征

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0218693

Jiacheng Xu, Rongzong Shen, Haoji Qian, Gaobo Lin, Jiani Gu, Jian Rong, Huan Liu, Yian Ding, Miaomiao Zhang, Yan Liu, Chengji Jin, Jiajia Chen, Genquan Han

引用次数: 0

Effects of mosaic crystal instrument functions on x-ray Thomson scattering diagnostics 镶嵌晶体仪器功能对 X 射线汤姆逊散射诊断的影响

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0222072

Thomas Gawne, Hannah Bellenbaum, Luke B. Fletcher, Karen Appel, Carsten Baehtz, Victorien Bouffetier, Erik Brambrink, Danielle Brown, Attila Cangi, Adrien Descamps, Sebastian Goede, Nicholas J. Hartley, Marie-Luise Herbert, Philipp Hesselbach, Hauke Höppner, Oliver S. Humphries, Zuzana Konôpková, Alejandro Laso Garcia, Björn Lindqvist, Julian Lütgert, Michael J. MacDonald, Mikako Makita, Willow Martin, Mikhail Mishchenko, Zhandos A. Moldabekov, Motoaki Nakatsutsumi, Jean-Paul Naedler, Paul Neumayer, Alexander Pelka, Chongbing Qu, Lisa Randolph, Johannes Rips, Toma Toncian, Jan Vorberger, Lennart Wollenweber, Ulf Zastrau, Dominik Kraus, Thomas R. Preston, Tobias Dornheim

{"title":"Effects of mosaic crystal instrument functions on x-ray Thomson scattering diagnostics","authors":"Thomas Gawne, Hannah Bellenbaum, Luke B. Fletcher, Karen Appel, Carsten Baehtz, Victorien Bouffetier, Erik Brambrink, Danielle Brown, Attila Cangi, Adrien Descamps, Sebastian Goede, Nicholas J. Hartley, Marie-Luise Herbert, Philipp Hesselbach, Hauke Höppner, Oliver S. Humphries, Zuzana Konôpková, Alejandro Laso Garcia, Björn Lindqvist, Julian Lütgert, Michael J. MacDonald, Mikako Makita, Willow Martin, Mikhail Mishchenko, Zhandos A. Moldabekov, Motoaki Nakatsutsumi, Jean-Paul Naedler, Paul Neumayer, Alexander Pelka, Chongbing Qu, Lisa Randolph, Johannes Rips, Toma Toncian, Jan Vorberger, Lennart Wollenweber, Ulf Zastrau, Dominik Kraus, Thomas R. Preston, Tobias Dornheim","doi":"10.1063/5.0222072","DOIUrl":"https://doi.org/10.1063/5.0222072","url":null,"abstract":"Mosaic crystals, with their high integrated reflectivities, are widely employed in spectrometers used to diagnose high energy density systems. X-ray Thomson scattering (XRTS) has emerged as a powerful diagnostic tool of these systems, providing in principle direct access to important properties such as the temperature via detailed balance. However, the measured XRTS spectrum is broadened by the spectrometer instrument function (IF), and without careful consideration of the IF one risks misdiagnosing system conditions. Here, we consider in detail the IF of 40 and 100 μm mosaic Highly Annealed Pyrolytic Graphite crystals, and how the broadening varies across the spectrometer in an energy range of 6.7–8.6 keV. Notably, we find a strong asymmetry in the shape of the IF toward higher energies. As an example, we consider the effect of the asymmetry in the IF on the temperature inferred via XRTS for simulated 80 eV CH plasmas and find that the temperature can be overestimated if an approximate symmetric IF is used. We, therefore, expect a detailed consideration of the full IF will have an important impact on system properties inferred via XRTS in both forward modeling and model-free approaches.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"16 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204281","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 high-Q THz stereo metasurface sensor based on double toroidal dipole with wide operating angle bandwidth 基于双环偶极子的高 Q 太赫兹立体元面传感器，具有宽工作角带宽

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0220850

Cong Chen, Peng Gao, Yaowei Dai, Hongzhong Cui, Xinyan Wang, Hai Liu

{"title":"The high-Q THz stereo metasurface sensor based on double toroidal dipole with wide operating angle bandwidth","authors":"Cong Chen, Peng Gao, Yaowei Dai, Hongzhong Cui, Xinyan Wang, Hai Liu","doi":"10.1063/5.0220850","DOIUrl":"https://doi.org/10.1063/5.0220850","url":null,"abstract":"A highly sensitive terahertz stereo metasurface sensor, characterized by a high quality factor (Q-factor) and based on dual toroidal dipole (TD) resonance, has been proposed. The optimal structural parameters are ascertained by comparing the pertinent parameters of the stereo and planar structures in relation to TD modal excitation. The effective excitation of the TD mode is demonstrated using the calculations of multipole scattered power, reflection spectra, surface currents, electric fields, and magnetic field distributions. It is crucial that the stereo metasurface exhibits simplicity and that the dual TD resonance can be readily excited through simple adjustments in the distance and height of the intermediate gap. It also demonstrates exceptionally high sensitivity and Q-factor, both of which are essential for sensing applications. Moreover, the proposed stereo terahertz metasurface sensor still shows excellent sensing performance in a wide range of incidence angles (±40°), which is of great significance for practical applications. In conclusion, this structure offers a novel design framework for high-performance terahertz sensors based on the TD mode.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"16 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204272","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

Toward the reproducible fabrication of conductive ferroelectric domain walls into lithium niobate bulk single crystals 在铌酸锂块状单晶中可重复地制造导电铁电畴壁

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0219300

Julius Ratzenberger, Iuliia Kiseleva, Boris Koppitz, Elke Beyreuther, Manuel Zahn, Joshua Gössel, Peter A. Hegarty, Zeeshan H. Amber, Michael Rüsing, Lukas M. Eng

{"title":"Toward the reproducible fabrication of conductive ferroelectric domain walls into lithium niobate bulk single crystals","authors":"Julius Ratzenberger, Iuliia Kiseleva, Boris Koppitz, Elke Beyreuther, Manuel Zahn, Joshua Gössel, Peter A. Hegarty, Zeeshan H. Amber, Michael Rüsing, Lukas M. Eng","doi":"10.1063/5.0219300","DOIUrl":"https://doi.org/10.1063/5.0219300","url":null,"abstract":"Ferroelectric domain walls (DWs) are promising structures for assembling future nano-electronic circuit elements on a larger scale since reporting domain wall currents of up to 1 mA per single DW. One key requirement hereto is their reproducible manufacturing by gaining preparative control over domain size and domain wall conductivity (DWC). To date, most works on DWC have focused on exploring the fundamental electrical properties of individual DWs within single-shot experiments, with an emphasis on quantifying the origins of DWC. Very few reports exist when it comes to comparing the DWC properties between two separate DWs, and literally nothing exists where issues of reproducibility in DWC devices have been addressed. To fill this gap while facing the challenge of finding guidelines for achieving predictable DWC performance, we report on a procedure that allows us to reproducibly prepare single hexagonal domains of a predefined diameter into uniaxial ferroelectric lithium niobate single crystals of 200 and 300 μm thickness, respectively. We show that the domain diameter can be controlled with an uncertainty of a few percent. As-grown DWs are then subjected to a standard procedure of current-limited high-voltage DWC enhancement, and they repetitively reach a DWC increase of six orders of magnitude. While all resulting DWs show significantly enhanced DWC values, their individual current–voltage (I–V) characteristics exhibit different shapes, which can be explained by variations in their 3D real structure reflecting local heterogeneities by defects, DW pinning, and surface-near DW inclination.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"46 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204279","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

Calculation and error analysis of virtual cathode caused by a thermionic cathode 热阴极引起的虚拟阴极的计算和误差分析

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0217364

Jian-Quan Li, Shu-Han Li

引用次数: 0

Enhancing superconductivity in CoSi2 films with laser annealing 用激光退火增强 CoSi2 薄膜的超导性

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0218950

P. Dumas, F. Gustavo, M. Opprecht, G. Freychet, P. Gergaud, S. Kerdilès, S. Guillemin, J. L. Lábár, B. Pécz, F. Lefloch, F. Nemouchi

引用次数: 0

Comparison of ultra-low lattice thermal conductivity of the full-Heusler compound Li2Rb(Cs)Bi after considering strong quartic anharmonicity 考虑强四次谐波后全赫斯勒化合物 Li2Rb(Cs)Bi 的超低晶格热导率比较

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0219749

Qian Guo, Yinchang Zhao, Yuming Sun, Jun Ni, Zhenhong Dai

引用次数: 0

Multi-mode non-diffraction vortex beams enabled by polarization-frequency multiplexing transmissive terahertz metasurfaces 利用偏振-频率复用透射太赫兹元表面实现多模非衍射涡旋波束

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-09 DOI: 10.1063/5.0222832

Mingzhong Wu, Xunjun He, Guangjun Lu, Zhaoxin Geng, Ying Zhang

{"title":"Multi-mode non-diffraction vortex beams enabled by polarization-frequency multiplexing transmissive terahertz metasurfaces","authors":"Mingzhong Wu, Xunjun He, Guangjun Lu, Zhaoxin Geng, Ying Zhang","doi":"10.1063/5.0222832","DOIUrl":"https://doi.org/10.1063/5.0222832","url":null,"abstract":"In terahertz (THz) wireless communication systems, non-diffraction vortex beams carrying an orbital angular momentum (OAM) have attracted extensive attention due to their ability to transmit information over long distances with high capacity. However, existing metasurfaces can only generate a single OAM mode non-diffracting vortex beam at reflection space for circular polarization (CP) incidence, limiting practical applications. To address this issue, we propose and design a polarization-frequency multiplexing transmissive THz metasurface to realize multi-mode non-diffracting vortex beams at linear polarization (LP) incidence. The meta-atom of this metasurface is composed of three anisotropic rectangular metallic structures embedded in vanadium dioxide (VO2) square rings, two circular aperture metallic grid layers, and four dielectric layers. By reasonably designing the size of the metal patch and the state of VO2, the designed metasurface can achieve polarization multiplexing and frequency multiplexing for LP incidence. Based on the phase response of the proposed meta-atoms, the transmissive metasurface can implement not only multi-mode non-diffraction vortex beams but also their space separation at two frequency ranges of 0.80–0.90 THz and 1.50–1.80 THz by changing the state of VO2. Therefore, the proposed multiple multiplexing metasurfaces can effectively shape the wavefront of non-diffraction vortex beams, which have broad application prospects in 6G THz communication.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"8 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204278","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