TY - JOUR
T1 - Structure of Fe-Cr-N nanocrystalline films with the perpendicular magnetic anisotropy
AU - Peng, D. L.
AU - Konno, T. J.
AU - Sumiyama, K.
AU - Suzuki, K.
N1 - Funding Information:
The authors wish to thank Dr T. Takada and Mr Y. Murakami for their help in the chemical analysis. One of the authors (D.L.P.) appreciates the financial support of the Ministry of Education, Science, Sports and Culture, Japan. This work is partially supported by a Grant-in-Aid for General Scientific Research (Grant No. 08405043) from the same Ministry.
PY - 1998/7/11
Y1 - 1998/7/11
N2 - The structure and magnetic properties of Fe-Cr-N films, prepared by sputtering, have been investigated by X-ray diffraction, transmission electron microscopy, vibrating sample magnetometry and Mössbauer spectroscopy. We obtained a saturation magnetization of 377 emu/cm3 and a perpendicular coercivity of 6.53 × 104 A/m for a Fe71Cr20N9 film, when the N2-to-Ar flow ratio was 0.3 and the substrate temperature was 523 K. The increase of the perpendicular magnetic anisotropy is accompanied by a reduction in the grain size of the α-Fe(Cr) phase and growth of the γ′-(Fe,Cr)4Nx phase. The γ′-phase is nonmagnetic at room temperature, displaying columnar growth, and the small ferromagnetic α-Fe(Cr) grains are distributed at the grain boundaries of the γ′-(Fe,Cr)4Nx columns. The shape anisotropy plays an important role in the perpendicular magnetic anisotropy in the present films.
AB - The structure and magnetic properties of Fe-Cr-N films, prepared by sputtering, have been investigated by X-ray diffraction, transmission electron microscopy, vibrating sample magnetometry and Mössbauer spectroscopy. We obtained a saturation magnetization of 377 emu/cm3 and a perpendicular coercivity of 6.53 × 104 A/m for a Fe71Cr20N9 film, when the N2-to-Ar flow ratio was 0.3 and the substrate temperature was 523 K. The increase of the perpendicular magnetic anisotropy is accompanied by a reduction in the grain size of the α-Fe(Cr) phase and growth of the γ′-(Fe,Cr)4Nx phase. The γ′-phase is nonmagnetic at room temperature, displaying columnar growth, and the small ferromagnetic α-Fe(Cr) grains are distributed at the grain boundaries of the γ′-(Fe,Cr)4Nx columns. The shape anisotropy plays an important role in the perpendicular magnetic anisotropy in the present films.
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U2 - 10.1016/S0022-3093(98)00488-8
DO - 10.1016/S0022-3093(98)00488-8
M3 - Article
AN - SCOPUS:0346457695
VL - 232-234
SP - 169
EP - 174
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
ER -