Abstract
To obtain magnetic tunnel junctions (MTJs) composed of non-equilibrium alloy, Co 2 FeSn films were prepared by atomically controlled alternate deposition at various substrate temperatures. X-ray diffraction patterns and Mössbauer spectra clarify that Co 2 FeSn films in the Heusler alloy phase can be realized by growing at a substrate temperature of 250°C or below. Phase separation into cubic CoSn, hexagonal CoSn and cubic CoFe phases occurs in films grown at substrate temperatures 300°C or greater. Fe/MgO/Co 2 FeSn MTJs were prepared with the Co 2 FeSn layer grown at various substrate temperatures. The MTJs with the ferromagnetic Co 2 FeSn layer grown at a substrate temperature of 250 C showed tunnel magnetoresistance ratios of 72.2 and 43.5 at 2 K and 300 K, respectively.
| Original language | English |
|---|---|
| Article number | 053902 |
| Journal | Journal of Applied Physics |
| Volume | 111 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Mar 1 2012 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
Preparation of Co 2 FeSn Heusler alloy films and magnetoresistance of Fe/MgO/Co 2 FeSn magnetic tunnel junctions . / Tanaka, M. A.; Ishikawa, Y.; Wada, Y.; Hori, S.; Murata, A.; Horii, S.; Yamanishi, Yoko; Mibu, K.; Kondou, K.; Ono, T.; Kasai, S.
In: Journal of Applied Physics, Vol. 111, No. 5, 053902, 01.03.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preparation of Co 2 FeSn Heusler alloy films and magnetoresistance of Fe/MgO/Co 2 FeSn magnetic tunnel junctions
AU - Tanaka, M. A.
AU - Ishikawa, Y.
AU - Wada, Y.
AU - Hori, S.
AU - Murata, A.
AU - Horii, S.
AU - Yamanishi, Yoko
AU - Mibu, K.
AU - Kondou, K.
AU - Ono, T.
AU - Kasai, S.
PY - 2012/3/1
Y1 - 2012/3/1
N2 - To obtain magnetic tunnel junctions (MTJs) composed of non-equilibrium alloy, Co 2 FeSn films were prepared by atomically controlled alternate deposition at various substrate temperatures. X-ray diffraction patterns and Mössbauer spectra clarify that Co 2 FeSn films in the Heusler alloy phase can be realized by growing at a substrate temperature of 250°C or below. Phase separation into cubic CoSn, hexagonal CoSn and cubic CoFe phases occurs in films grown at substrate temperatures 300°C or greater. Fe/MgO/Co 2 FeSn MTJs were prepared with the Co 2 FeSn layer grown at various substrate temperatures. The MTJs with the ferromagnetic Co 2 FeSn layer grown at a substrate temperature of 250 C showed tunnel magnetoresistance ratios of 72.2 and 43.5 at 2 K and 300 K, respectively.
AB - To obtain magnetic tunnel junctions (MTJs) composed of non-equilibrium alloy, Co 2 FeSn films were prepared by atomically controlled alternate deposition at various substrate temperatures. X-ray diffraction patterns and Mössbauer spectra clarify that Co 2 FeSn films in the Heusler alloy phase can be realized by growing at a substrate temperature of 250°C or below. Phase separation into cubic CoSn, hexagonal CoSn and cubic CoFe phases occurs in films grown at substrate temperatures 300°C or greater. Fe/MgO/Co 2 FeSn MTJs were prepared with the Co 2 FeSn layer grown at various substrate temperatures. The MTJs with the ferromagnetic Co 2 FeSn layer grown at a substrate temperature of 250 C showed tunnel magnetoresistance ratios of 72.2 and 43.5 at 2 K and 300 K, respectively.
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U2 - 10.1063/1.3688324
DO - 10.1063/1.3688324
M3 - Article
VL - 111
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 5
M1 - 053902
ER -