|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Magnetic Anisotropy of Epitaxially Grown L10 Mn-(Ga,Al) Alloy Thin Films
||Takao Suzuki, Siqian Zhao
|On-Site Speaker (Planned)
The L10 MnAl and MnGa are known to exhibit the high magnetic anisotropy constant K of 107erg/cc at room temperature. A recent experimental work suggested that the K(T) for L10 MnAl nano-crystalline thin films linearly decreases with saturation magnetization Ms(T).1 On the other hand, the K for the L10 MnGa nano-crystalline thin films exhibited the 8th power dependence on Ms(T).2 Those experimental results are at variance with a single ion model where one would expect the major contribution of Mn to the magnetic anisotropy, thus expect the 3rd or higher power dependence. Epitaxially grown thin films of L10 MnGa have been successfully fabricated onto MgO(100) single crystal substrates by sputter-deposition. The magnetic anisotropy constant K measured by a torque method over a temperature range from 5 to 400K is discussed in conjunction with the temperature change of Ms. The work was partially supported by NSF-CMMI 1229049. References: 1.S. Zhao,et al.: IEEE Trans.MAG.51, 2101604(2015); 2.S. Zhao,et al.: AIP Advances,6,056025(2016).