Magnetic, magnetocaloric, and magnetotransport properties of RCo1.8Mn0.2 (R=Er, Ho, Dy, and Tb) compounds |
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| Authors: | Arjun K. Pathak Igor DubenkoShane Stadler Naushad Ali |
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| Affiliation: | a Department of Physics, Southern Illinois University Carbondale, IL 62901, USA
b Department of Physics and Astronomy, Louisiana State University, Baton Rouge LA 70803, USA |
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| Abstract: | The magnetic, magnetocaloric, and magnetotransport properties of RCo1.8Mn0.2 (R=Er, Ho, Dy, and Tb) were studied by room temperature X-ray diffraction, magnetization, and resistivity measurements at a temperature interval of 5-400 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. |
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| Keywords: | Magnetic entropy Refrigeration capacity Laves phase |
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