We investigate the evolution of spin polarization, spontaneous Hall angle (SHA), saturation magnetization and Curie temperature of $B2$-ordered Fe$_{60}$Al$_{40}$ thin films under varying antisite disorder, induced by Ne$^{+}$-ion irradiation. The spin polarization increases monotonically as a function of ion fluence. A relatively high polarization of 46 % and the SHA of 3.1 % are achieved on 40 nm thick films irradiated with 2 $\cdot$ 10$^{16}$ ions/cm$^2$ at 30 keV. An interesting divergence in the trends of the magnetization and SHA is observed for low disorder concentrations. The high spin polarization and its broad tunability range make ion-irradiated Fe$_{60}$Al$_{40}$ a promising material for application in spin electronic devices.
Magneto-structural correlations in a systematically disordered B2 lattice
某些B2有序合金如Fe $_{60}$ Al $_{40}$中的铁磁性可以通过原子排列的反位无序来开启和调节。无序伴随着晶格参数的$\sim$ 1%增加。本文对B2 Fe $_{60}$ Al $_{40}$薄膜进行了系统的无序化研究,得到了序参量($S$)、晶格参数($a_0$)和感应饱和磁化强度($M_{s}$)之间的相关关系。随着晶格逐渐无序化,在1- $S$ =0.6和$a_0$ =291 μ m处出现临界点,其中观察到$M_{s}$的急剧增加。DFT计算表明,在临界点以下,系统的磁性行为仍然是完全有序的,而在临界点以上,主要是无序状态下$a_0$的增加决定了$M_{s}$。在这里获得的见解可以是有用的合金通过无序实现定制的磁性能。
Room temperature intrinsic anomalous Hall effect in disordered half-metallic ferromagnetic quaternary Heusler alloy CoRuFeSi
National Institute of Technology Andhra Pradesh(安得拉邦国立技术学院);Indian Institute of Technology Hyderabad(海德拉巴印度理工学院);Institute of Low Temperature and Structure Research, Polish Academy of Sciences(波兰科学院低温结构研究所);Indian Institute of Technology Kanpur(坎普尔印度理工学院);UGC-DAE Consortium for Scientific Research, Kolkata Centre(UGC-DAE科学研究中心加尔各答中心)
Roadmap for electronic structure, anharmonicity, and electron-phonon calculations in locally disordered inorganic and hybrid halide perovskites
Univ Rennes, INSA Rennes, CNRS, Institut FOTON - UMR 6082(雷恩大学,雷恩国立应用科学学院,法国国家科学研究中心,FOTON研究所);Computation-based Science and Technology Research Center, The Cyprus Institute(塞浦路斯研究院计算科学与技术研究中心);Univ Rennes, ENSCR, INSA Rennes, CNRS, ISCR - UMR 6226(雷恩大学,雷恩高等师范学院,雷恩国立应用科学学院,法国国家科学研究中心,ISCR研究所);Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin(德克萨斯大学奥斯汀分校奥登计算工程与科学学院);Department of Physics, The University of Texas at Austin(德克萨斯大学奥斯汀分校物理系)
Long-range magnetic ordering and structural phase transition in disordered high-entropy spinel chromites
Thapar Institute of Engineering and Technology(塔帕尔工程技术学院);UGC-DAE Consortium for Scientific Research(UGC-DAE科学研究联盟);Bhabha Atomic Research Centre(巴哈原子研究中心)
Enhancement of giant magnetoresistance effect in the Ruddlesden-Popper phase Sr3Fe2-xCoxO7-d: Predominant role of oxygen nonstoichiometry and magnetic phase separation
From Chemical Complexity to Tunable Magnetic Ordering in Highly Disordered High-Entropy Spinel Oxides
Thapar Institute of Engineering and Technology(塔帕尔工程技术学院);UGC-DAE Consortium for Scientific Research(UGC-DAE科学研究联盟);Freie Universität Berlin(柏林自由大学);Helmholtz Zentrum Berlin für Materialien und Energie(柏林亥姆霍兹材料与能源中心);Normandie University(诺曼底大学)
Electrical- and magneto-transport across the thermo-elastic martensitic transformation in anti-site-disordered off-stoichiometric Co-Fe-Ti-Si Heusler alloy thin films