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Title: Heat capacity, resistivity, and angular dependent magnetization studies of single crystal Nd 1 + ϵ Fe 4 B 4 for ϵ 1 7

Journal Article · · Journal of Magnetism and Magnetic Materials

Advances in crystal growth have allowed for synthesis of large single crystals of Nd1+ϵFe4B4, a well-known phase with a modulated structure. As a result we are able to report heat capacity and resistivity measurements on a single crystal Nd1+ϵFe4B4 sample with a distribution of ϵ that skews towards the solubility limit of Nd near ϵ ≈ 17. 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+ϵFe4B4 system. Here, 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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1350932
Alternate ID(s):
OSTI ID: 1396908
Journal Information:
Journal of Magnetism and Magnetic Materials, Vol. 435, Issue C; ISSN 0304-8853
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English