## Abstract

L1_{0}-type Co_{100-x}Pt_{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 × 10^{7} erg cm^{-3} for 50 at. % Pt. The second- and fourth-order anisotropy constants K_{1} and K_{2} determined by the Sucksmith-Thompson method become 4.1 and 0.6 × 10 ^{7} erg cm^{-3}, respectively. The value of K _{1}+K_{2} corresponding to the magnetocrystalline energy difference between the c and a axes becomes maximum at x = 50.

Original language | English |
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Article number | 112515 |

Pages (from-to) | 1-3 |

Number of pages | 3 |

Journal | Applied Physics Letters |

Volume | 86 |

Issue number | 11 |

DOIs | |

Publication status | Published - 2005 Mar 14 |

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