Large magnetocrystalline anisotropy energy of L10-type Co 100-xPtx bulk single crystals prepared under compressive stress

H. Shima; K. Oikawa; A. Fujita; K. Fukamichi; K. Ishida

doi:10.1063/1.1861977

Large magnetocrystalline anisotropy energy of L1₀-type Co _100-xPt_x bulk single crystals prepared under compressive stress

H. Shima, K. Oikawa, A. Fujita, K. Fukamichi, K. Ishida

ENG - Metallurgy

Tohoku University

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

13 Citations (Scopus)

Abstract

L1₀-type Co_100-xPt_x single crystals in a single variant state were prepared by ordering under a compressive stress in order to determine accurately the uniaxial magnetocrystalline anisotropy constant K_U. Both the lattice constants a and c increase with increasing Pt concentration, whereas the axial ratio c/a becomes minimum at x=50. The value of K_U directly determined at 298 K exhibits a maximum value of 4.5 × 10⁷ erg cm^-3 for 50 at. % Pt. The second- and fourth-order anisotropy constants K₁ and K₂ determined by the Sucksmith-Thompson method become 4.1 and 0.6 × 10 ⁷ erg cm^-3, respectively. The value of K ₁+K₂ corresponding to the magnetocrystalline energy difference between the c and a axes becomes maximum at x = 50.

Original language	English
Article number	112515
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	86
Issue number	11
DOIs	https://doi.org/10.1063/1.1861977
Publication status	Published - 2005 Mar 14

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abstract = "L10-type Co100-xPtx single crystals in a single variant state were prepared by ordering under a compressive stress in order to determine accurately the uniaxial magnetocrystalline anisotropy constant KU. Both the lattice constants a and c increase with increasing Pt concentration, whereas the axial ratio c/a becomes minimum at x=50. The value of KU directly determined at 298 K exhibits a maximum value of 4.5 × 107 erg cm-3 for 50 at. % Pt. The second- and fourth-order anisotropy constants K1 and K2 determined by the Sucksmith-Thompson method become 4.1 and 0.6 × 10 7 erg cm-3, respectively. The value of K 1+K2 corresponding to the magnetocrystalline energy difference between the c and a axes becomes maximum at x = 50.",

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T1 - Large magnetocrystalline anisotropy energy of L10-type Co 100-xPtx bulk single crystals prepared under compressive stress

AU - Shima, H.

AU - Oikawa, K.

AU - Fujita, A.

AU - Fukamichi, K.

AU - Ishida, K.

PY - 2005/3/14

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N2 - L10-type Co100-xPtx single crystals in a single variant state were prepared by ordering under a compressive stress in order to determine accurately the uniaxial magnetocrystalline anisotropy constant KU. Both the lattice constants a and c increase with increasing Pt concentration, whereas the axial ratio c/a becomes minimum at x=50. The value of KU directly determined at 298 K exhibits a maximum value of 4.5 × 107 erg cm-3 for 50 at. % Pt. The second- and fourth-order anisotropy constants K1 and K2 determined by the Sucksmith-Thompson method become 4.1 and 0.6 × 10 7 erg cm-3, respectively. The value of K 1+K2 corresponding to the magnetocrystalline energy difference between the c and a axes becomes maximum at x = 50.

AB - L10-type Co100-xPtx single crystals in a single variant state were prepared by ordering under a compressive stress in order to determine accurately the uniaxial magnetocrystalline anisotropy constant KU. Both the lattice constants a and c increase with increasing Pt concentration, whereas the axial ratio c/a becomes minimum at x=50. The value of KU directly determined at 298 K exhibits a maximum value of 4.5 × 107 erg cm-3 for 50 at. % Pt. The second- and fourth-order anisotropy constants K1 and K2 determined by the Sucksmith-Thompson method become 4.1 and 0.6 × 10 7 erg cm-3, respectively. The value of K 1+K2 corresponding to the magnetocrystalline energy difference between the c and a axes becomes maximum at x = 50.

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Large magnetocrystalline anisotropy energy of L1₀-type Co _100-xPt_x bulk single crystals prepared under compressive stress

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