Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd1+ε Fe4B4 for ε ≈ 1/7

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:435

Article

Conner, B. S.¹  Susner, M. A.^1,2  Lampen-Kelley, P.¹  May, A. F.¹  McGuire, M. A.¹  Yan, J. -Q.¹  Sales, B. C.¹ 

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] UES Inc, Beavercreek, OH 45432 USA

关键词: Nd1+epsilon Fe4B4;    Magnetic anisotropy;    Crystal fields;    Resistivity;    Heat capacity;   

DOI  :  10.1016/j.jmmm.2017.04.002

来源: Elsevier

【 摘 要 】

Advances in crystal growth have allowed for synthesis of large single crystals of Nd1+epsilon Fe4B4, a wellknown phase with a modulated structure. As a result we are able to report heat capacity and resistivity measurements on a single crystal Nd1+epsilon Fe4B4 sample with a distribution of epsilon that skews towards the solubility limit of Nd near epsilon approximate to 1/7. Heat capacity measurements show evidence of crystal field splitting at temperatures higher than the long-range ferromagnetic Curie temperature. Heat capacity, resistivity, and magnetization measurements all confirm a Curie temperature of 7 K which is lower than previously reported values in the Nd1+epsilon Fe4B4 system. We also perform measurements of the angular dependence of the magnetization and discover behavior associated with the magnetic anisotropy that is inconsistent with the simple description previously proposed. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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