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Magnetocaloric and magnetotransport properties in RRhSn (R = Tb-Tm) series

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Title Magnetocaloric and magnetotransport properties in RRhSn (R = Tb-Tm) series
 
Creator GUPTA, SB
SURESH, KG
NIGAM, AK
 
Subject SN-119 MOSSBAUER-SPECTROSCOPY
LOW-TEMPERATURE RESISTIVITY
STANNIDES RERHSN RE
MAGNETIC-PROPERTIES
RARE-EARTH
PHASE-TRANSITIONS
HEAT-CAPACITY
HO
MAGNETORESISTANCE
GD-5(SI2GE2)
 
Description We have synthesized polycrystalline RRhSn (R=Tb-Tm) compounds, which crystallize in the hexagonal structure with space group P (6) over bar 2m. All the compounds, except HoRhSn, are antiferromagnetic at low temperatures. TbRhSn and DyRhSn show multiple magnetic transitions and metamagnetic behavior. Heat capacity and electrical resistivity data in different temperature regimes were fitted to identify various contributions to them. Magnetocaloric effect (MCE) in all the compounds has been calculated in terms of the isothermal magnetic entropy change and the adiabatic temperature change. ErRhSn and TmRhSn show Schottky anomaly in the heat capacity data. Among the compounds studied, HoRhSn shows the maximum adiabatic temperature change of 6.5K for a field of 50 kOe. DyRhSn and TmRhSn also show large positive magnetocaloric effect below 10 K. A sign reversal accompanied by a large positive magnetoresistance (MR) at low temperatures appears to be a common feature in this series of compounds. Narrow domain wall dynamics appears to be the main reason behind the large positive magnetoresistance in all the compounds. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766900]
 
Publisher AMER INST PHYSICS
 
Date 2014-10-16T13:09:20Z
2014-10-16T13:09:20Z
2012
 
Type Article
 
Identifier JOURNAL OF APPLIED PHYSICS, 112(10)
http://dx.doi.org/10.1063/1.4766900
http://dspace.library.iitb.ac.in/jspui/handle/100/15628
 
Language en