scholarly journals Enhanced perpendicular magnetocrystalline anisotropy energy in an artificial magnetic material with bulk spin-momentum coupling

2019 ◽  
Vol 99 (18) ◽  
Author(s):  
Abdul-Muizz Pradipto ◽  
Kay Yakushiji ◽  
Woo Seung Ham ◽  
Sanghoon Kim ◽  
Yoichi Shiota ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Energy ◽  
Momentum Coupling ◽  
Spin Momentum ◽  
Magnetocrystalline Anisotropy Energy

scholarly journals Thermodynamics and Magnetism of YCo5 Compound Doped with Fe and Ni: An Ab Initio Study

2020 ◽  
Vol 10 (17) ◽  
pp. 6037
Author(s):  
Alexander Landa ◽  
Per Söderlind ◽  
Emily E. Moore ◽  
Aurelien Perron
Keyword(s):  
Curie Temperature ◽  
Permanent Magnet ◽  
Density Functional ◽  
Magnetocrystalline Anisotropy ◽  
Density Functional Theory Calculations ◽  
Anisotropy Energy ◽  
Functional Theory ◽  
Energy Product ◽  
Calphad Modeling ◽  
Magnetocrystalline Anisotropy Energy

YCo5 permanent magnet exhibits high uniaxial magnetocrystalline anisotropy energy and has a high Curie temperature. These are good properties for a permanent magnet, but YCo5 has a low energy product, which is notably insufficient for a permanent magnet. In order to improve the energy product in YCo5, we suggest replacing cobalt with iron, which has a much bigger magnetic moment. With a combination of density-functional-theory calculations and thermodynamic CALculation of PHAse Diagrams (CALPHAD) modeling, we show that a new magnet, YFe3(Ni1-xCox)2, is thermodynamically stable and exhibits an improved energy product without significant detrimental effects on the magnetocrystalline anisotropy energy or the Curie temperature.

Magnetic and Structural Studies on Au/3d-metal Multilayered Films with Artificial Superstructures.

1989 ◽  
Vol 151 ◽  
Author(s):  
Satoru Araki ◽  
Tsutomu Takahata ◽  
Hitoshi Dohnomae ◽  
Tetsuo Okuyama ◽  
Teruya Shinjo
Keyword(s):  
Magnetocrystalline Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Diffraction Method ◽  
Anisotropy Energy ◽  
Buffer Layers ◽  
Perpendicular Anisotropy ◽  
Multilayered Films ◽  
Transmission Electron ◽  
Energy Constants ◽  
Magnetocrystalline Anisotropy Energy

ABSTRACTAu/3d-metal(Fe, Co, and Ni) artificial multilayered films were prepared by alternate deposition technique in ultrahigh vacuum. Well defined superstructures were confirmed by transmission electron microscopy and Xray diffraction method. All 3d-metals were epitaxially grown on (111) oriented Au buffer layers. A large perpendicular magnetic anisotropy was observed in Au/Co multilayered films. When Co layer thickness was 4.7 Å, the effective perpendicular anisotropy energy Ku was 9.6x106 erg/cm3. The surface (interface) anisotropy energy constants, Ks, of Au/Co and Au/Fe multilayered films were estimated to be 0.42 erg/cm2 and 0.51 erg/cm2, respectively. The volume contribution, Kv, was interpreted from the observed value of saturation magnetization and the bulk values of magnetocrystalline anisotropy energy constants K1 and K2.

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