HIP synthesis of η-carbide-type nitrides Fe3W3N and Fe6W6N and their magnetic properties

JOURNAL OF ALLOYS AND COMPOUNDS

卷:509

Article

Waki, T.¹  Terazawa, S.¹  Tabata, Y.¹  Murase, Y.²  Kato, M.²  Hirota, K.²  Ikeda, S.³  Kobayashi, H.³  Sato, K.⁴  Kindo, K.⁴  Nakamura, H.¹ 

[1] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

[2] Doshisha Univ, Dept Mol Chem & Biochem, Fac Sci & Engn, Kyotanabe 6100321, Japan

[3] Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan

[4] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

关键词: Nitride materials;    Gas-solid reactions;    Sintering;    Magnetisation;    High magnetic field;    Mossbauer spectroscopy;   

DOI  :  10.1016/j.jallcom.2011.07.025

来源: Elsevier

【 摘 要 】

We have succeeded in synthesising iron-tungsten nitrides using the hot isostatic pressing (HIP) method and have measured their magnetic properties. Two eta-carbide-type iron-tungsten nitrides with lattice constants a = 11.043(1) and 10.937(2) angstrom were synthesised directly from metal elements under high-pressure nitrogen gas. Their compositions are expected to be Fe3W3N and Fe6W6N in analogy with other eta-carbide-type compounds. Fe3W3N is a ferromagnet with a Curie temperature T-C = 110 K and a saturation moment PS = 0.78 mu(B)/Fe, whereas Fe6W6N is an antiferromagnet with a Neel temperature T-N = 75 K and shows a metamagnetic transition at around 25 T. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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