scholarly journals Dependence of Atomic Thickness on Interfacial Conditions and Magnetocrystalline Anisotropy in SmCo5/Sm2Co17 Multilayer

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 56
Author(s):  
Soyoung Jekal
Keyword(s):  
Coupling Strength ◽  
First Principles ◽  
Exchange Coupling ◽  
Magnetocrystalline Anisotropy ◽  
Model System ◽  
Anisotropy Energy ◽  
First Principles Calculations ◽  
Magnetic Structures ◽  
Interfacial Conditions ◽  
Magnetocrystalline Anisotropy Energy

We have performed first-principles calculations to study the interfacial exchange coupling and magnetocrystalline anisotropy energy in a SmCo 5 /Sm 2 Co 17 multilayer model system. The phase of SmCo 5 and Sm 2 Co 17 stacking along (0001) direction are structurally well matched. The atomic structure, including the alignment and the separation between layers, were firstly optimized. Then the non-collinear magnetic structures were calculated to explore the exchange coupling across the interface and the variation of magnetocrystalline anisotropy energy. We found that the inter-phase exchange coupling strength, rotating behavior and magnetocrystalline anisotropy strongly depend on the atomic thickness of the SmCo 5 and Sm 2 Co 17 phase.

scholarly journals Dependence of Atomic Thickness on Interfacial Conditions and Magnetocrystalline Anisotropy in SmCo5/Sm2Co17 Multilayer

2018 ◽  
Author(s):  
Soyoung Jekal
Keyword(s):  
Atomic Structure ◽  
Coupling Strength ◽  
First Principles ◽  
Exchange Coupling ◽  
Magnetocrystalline Anisotropy ◽  
Model Systems ◽  
First Principles Calculations ◽  
Magnetic Structures ◽  
Multilayer Model ◽  
Interfacial Conditions

We have performed first-principles calculations to study the interfacial exchange coupling and magnetocrystalline anisotropy (MCA) energy in a SmCo5/Sm2Co17 multilayer model systems. The phase of SmCo5 and Sm2Co17 stacking along (0001) direction are structurally well matched. The atomic structure, including the alignment and the separation between layers, were firstly optimized. Then the non-collinear magnetic structures were calculated to explore the exchange coupling across the interface and the variation of MCA energy. We found that the inter-phase exchange coupling strength, rotating behavior and MCA energy are strongly dependent on the atomic thickness of the SmCo5 and Sm2Co17 phase.

Enhancing perpendicular magnetocrystalline anisotropy in Fe ultrathin films by non-noble transition-metal substrate

2020 ◽  
Vol 31 (09) ◽  
pp. 2050134
Author(s):  
Shanhu Zhou ◽  
Jun Hu
Keyword(s):  
Magnetic Properties ◽  
Ultrathin Films ◽  
First Principles ◽  
Proximity Effect ◽  
Magnetocrystalline Anisotropy ◽  
Atomic Layer ◽  
Metal Substrate ◽  
First Principles Calculations ◽  
Magnetic Proximity Effect ◽  
Magnetocrystalline Anisotropy Energy

Based on first-principles calculations, we studied the magnetic properties of ultrathin Fe film on a nonmagnetic substrate Ta(001). We found that the perpendicular magnetocrystalline anisotropy (PMA) of Fe/Ta(001) system with only one or two Fe atomic layer(s) can be enhanced significantly, and the corresponding magnetocrystalline anisotropy energy is enlarged tos about 3 times of that in pure ultrathin Fe film. Analysis of electronic properties demonstrates that the magnetic proximity effect at the Fe/Ta interface plays an important role in the enhancement of the PMA. Alternative arrangement of Ta and Fe layers with more Fe/Ta interfaces may further strengthen the PMA.

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