Magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys

K. Kobayashi; R. Y. Umetsu; A. Fujita; K. Oikawa; R. Kainuma; K. Fukamichi; K. Ishida

doi:10.1016/j.jallcom.2005.03.037

Magnetic properties and phase stability of half-metal-type Co ₂Cr_1-xFe_xGa alloys

K. Kobayashi, R. Y. Umetsu, A. Fujita, K. Oikawa, R. Kainuma, K. Fukamichi, K. Ishida

Tohoku University

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The magnetic properties and phase stability of half-metal-type Co ₂Cr_1-xFe_xGa alloys were investigated by differential scanning calorimetry (DSC), in a superconducting quantum interference device (SQUID) magnetometer and in a vibrating sample magnetometer (VSM), and by transmission electron microscopy (TEM). It was found that the L2₁-type single-phase is obtainable for the entire concentration of x and that the value of the saturation magnetic moment M_s at 4.2 K in the lower composition range of x is in agreement with the generalized Slater-Pauling line, while it is rather larger than the generalized Slater-Pauling line above x = 0.6. The Curie temperature T_c monotonically increases, whereas the transition temperature from the L2 ₁- to B2-type phase TtB2/L21 is almost constant at 1082 ± 13 K with increasing x.

Original language	English
Pages (from-to)	60-63
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	399
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2005.03.037
Publication status	Published - 2005 Aug 16

Keywords

L2-type phase
Magnetic moment
Order-disorder transition
Spintronic devices

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10.1016/j.jallcom.2005.03.037

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title = "Magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys",

abstract = "The magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys were investigated by differential scanning calorimetry (DSC), in a superconducting quantum interference device (SQUID) magnetometer and in a vibrating sample magnetometer (VSM), and by transmission electron microscopy (TEM). It was found that the L21-type single-phase is obtainable for the entire concentration of x and that the value of the saturation magnetic moment Ms at 4.2 K in the lower composition range of x is in agreement with the generalized Slater-Pauling line, while it is rather larger than the generalized Slater-Pauling line above x = 0.6. The Curie temperature Tc monotonically increases, whereas the transition temperature from the L2 1- to B2-type phase TtB2/L21 is almost constant at 1082 ± 13 K with increasing x.",

keywords = "L2-type phase, Magnetic moment, Order-disorder transition, Spintronic devices",

author = "K. Kobayashi and Umetsu, {R. Y.} and A. Fujita and K. Oikawa and R. Kainuma and K. Fukamichi and K. Ishida",

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T1 - Magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys

AU - Kobayashi, K.

AU - Umetsu, R. Y.

AU - Fujita, A.

AU - Oikawa, K.

AU - Kainuma, R.

AU - Fukamichi, K.

AU - Ishida, K.

PY - 2005/8/16

Y1 - 2005/8/16

N2 - The magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys were investigated by differential scanning calorimetry (DSC), in a superconducting quantum interference device (SQUID) magnetometer and in a vibrating sample magnetometer (VSM), and by transmission electron microscopy (TEM). It was found that the L21-type single-phase is obtainable for the entire concentration of x and that the value of the saturation magnetic moment Ms at 4.2 K in the lower composition range of x is in agreement with the generalized Slater-Pauling line, while it is rather larger than the generalized Slater-Pauling line above x = 0.6. The Curie temperature Tc monotonically increases, whereas the transition temperature from the L2 1- to B2-type phase TtB2/L21 is almost constant at 1082 ± 13 K with increasing x.

AB - The magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys were investigated by differential scanning calorimetry (DSC), in a superconducting quantum interference device (SQUID) magnetometer and in a vibrating sample magnetometer (VSM), and by transmission electron microscopy (TEM). It was found that the L21-type single-phase is obtainable for the entire concentration of x and that the value of the saturation magnetic moment Ms at 4.2 K in the lower composition range of x is in agreement with the generalized Slater-Pauling line, while it is rather larger than the generalized Slater-Pauling line above x = 0.6. The Curie temperature Tc monotonically increases, whereas the transition temperature from the L2 1- to B2-type phase TtB2/L21 is almost constant at 1082 ± 13 K with increasing x.

KW - L2-type phase

KW - Magnetic moment

KW - Order-disorder transition

KW - Spintronic devices

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Magnetic properties and phase stability of half-metal-type Co ₂Cr_1-xFe_xGa alloys

Abstract

Keywords

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