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Effects of antiferro-ferromagnetic phase coexistence and spin fluctuations on the magnetic and related properties of NdCuSi

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Title Effects of antiferro-ferromagnetic phase coexistence and spin fluctuations on the magnetic and related properties of NdCuSi
 
Creator GUPTA, S
SURESH, KG
DAS, A
NIGAM, AK
HOSER, A
 
Subject GIANT MAGNETORESISTANCE
EXCHANGE
ALLOYS
RCUSI
GD
ND
 
Description Polycrystalline NdCuSi is found to show co-existence of antiferromagnetic (AFM) and ferromagnetic (FM) phases at low temperatures, as revealed by neutron diffraction data. The coexistence is attributed to the competing exchange interactions and crystal field effect. The compound shows a large, low-field magnetoresistance (MR) of similar to-32% at 20 kOe below T-N (3.1 K), which becomes similar to-36% at 50 kOe. The MR value at 50 kOe is found to be the highest among the RTX compounds. Magnetocaloric effect (MCE) is also found to show a large value of similar to 11 J/kg K close to TN. Resistivity data show the presence of spin fluctuations, which get suppressed by the applied field. Large MR and MCE in this compound arise due to the coexistence of the two phases. The field dependencies of MR and MCE show quadratic behavior, confirming the presence of spin fluctuations. (C) 2015 Author(s).
 
Publisher AMER INST PHYSICS
 
Date 2016-01-15T07:43:07Z
2016-01-15T07:43:07Z
2015
 
Type Article
 
Identifier APL MATERIALS, 3(6)
2166-532X
http://dx.doi.org/10.1063/1.4922387
http://dspace.library.iitb.ac.in/jspui/handle/100/18079
 
Language en