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Multiple phase transitions and magnetoresistance of HoFe4Ge2

TitleMultiple phase transitions and magnetoresistance of HoFe4Ge2
Publication TypeJournal Article
Year of Publication2015
AuthorsLiu, J, Pecharsky, VK, Gschneidner, KA
JournalJournal of Alloys and Compounds
Date Published05
Type of ArticleArticle
ISBN Number0925-8388
Accession NumberWOS:000350388800005
Keywordsdyfe4ge2, electrical resistivity, erfe4ge2, gd-5(si2ge2), Heat capacity, Magnetic properties, magnetoresistance, neutron-diffraction, Rare earth intermetallics, reentrant magnetoelastic transition, xrpd

A systematic study of the structural, magnetic, heat capacity, electrical resistivity and magnetoresistance properties of HoFe4Ge2 has been performed. The temperature dependencies of the magnetization and heat capacity show three magnetic transitions at T-N = 51 K, T-f1 = 42 K, and T-f2 = 15 K. The high temperature transition is antiferromagnetic ordering and the two low temperature phase transitions are due to rearrangements of the magnetic structure. A kinetically arrested phase is observed below a freezing point of similar to 11 K. Below 35 K, the behavior of the isothermal magnetization reflects a first- order metamagnetic phase transition. Multiple phase transitions are also manifested in the electrical resistivity behavior. For a field change of 30 kOe, a large magnetoresistance of similar to 30% is observed near T-f2 (15 K). (C) 2015 Elsevier B.V. All rights reserved.

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