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Understanding the magnetic, electronic and optical properties of ternary rare earth intermetallic compound HoNiSi

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Title Understanding the magnetic, electronic and optical properties of ternary rare earth intermetallic compound HoNiSi
 
Creator GUPTA, S
SURESH, KG
LUKOYANOV, AV
KNYAZEV, YV
KUZ'MIN, YI
 
Subject MAGNETORESISTANCE
ER
Magneto-resistance
Electronic structure
Optical properties
Intermetallic compounds
 
Description A number of experiments have been performed to study magnetic, electronic and optical properties of HoNiSi, along with theoretical calculations. The compound crystallizes in orthorhombic crystal structure and orders antiferromagnetically at T-N = 4.6 K. Magnetization isotherms show curvature in low fields, revealing a field induced metamagnetic transition. Application of field reduces the resistivity near T-N, which results in a large negative MR. The maximum value of MR has been found to be similar to 24% at 4 K for 50 kOe. Strong antiferromagnetic interactions among the moments below 4 K result in positive MR, which changes with field. The antiferromagnetic ordering with the effective magnetic moments of Ho close to the observed value is obtained in the LSDA + U calculations accounting for the electronic correlations in the 4f Ho shell. In the experimental optical conductivity interband transitions involving 4f Ho and 5d Ho forms the main features in good agreement with the theoretical electronic structure of HoNiSi. (C) 2015 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE SA
 
Date 2016-01-14T14:15:14Z
2016-01-14T14:15:14Z
2015
 
Type Article
 
Identifier JOURNAL OF ALLOYS AND COMPOUNDS, 650,542-546
0925-8388
1873-4669
http://dx.doi.org/10.1016/j.jallcom.2015.08.036
http://dspace.library.iitb.ac.in/jspui/handle/100/17702
 
Language en