Title

Magnetic, magnetocaloric, and magnetotransport properties of RCo 1.8Mn0.2 (R=Er, Ho, Dy, and Tb) compounds

Document Type

Article

Publication Date

10-1-2011

Abstract

The magnetic, magnetocaloric, and magnetotransport properties of RCo 1.8Mn0.2 (R=Er, Ho, Dy, and Tb) were studied by room temperature X-ray diffraction, magnetization, and resistivity measurements at a temperature interval of 5400 K and magnetic fields up to 5 T. The Curie temperature of RCo2 was found to increase significantly when 10% Mn was substituted for Co. The effective paramagnetic moments were found to be in reasonable agreement with their theoretical values. A large magnetoresistance (MR) of Δρ/ρo≈-13.5% for R=Ho at T≈153 K for ΔH=5 T has been observed. The maximum relative cooling capacities vary from 467 J/kg at low temperature for R=Er to 202 J/kg at the near room temperature for R=Tb. © 2011 Elsevier B.V.

Publication Source (Journal or Book title)

Journal of Magnetism and Magnetic Materials

First Page

2436

Last Page

2440

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