Anomalous magnetoresistance behavior of R(2)Ni(3)Si(5) (R=Pr,Dy,Ho)

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Anomalous magnetoresistance behavior of R(2)Ni(3)Si(5) (R=Pr,Dy,Ho)

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Title: Anomalous magnetoresistance behavior of R(2)Ni(3)Si(5) (R=Pr,Dy,Ho)
Author: MAZUMDAR, C; NIGAM, AK; NAGARAJAN, R; GUPTA, LC; GODART, C; PADALIA, BD; CHANDRA, G; VIJAYARAGHAVAN, R
Abstract: Magnetoresistance (MR) measurements on the antiferromagnetically ordered polycrystalline R(2)Ni(3)Si(5) (R = Pr, Dy, Ho; T-N = 8.5 K, 9.5 K, 6.0 K, respectively) materials are reported here. Field dependence of MR, measured both below and above their respective ordering temperatures and up to a field of 45 kOe, is found to be anomalous. In all the three cases, in the magnetically ordered state, MR is not monotonic but exhibits a maximum and a minimum. A considerable contribution to MR, with nearly linear held dependence and persisting even above the magnetic ordering temperature, is observed, which is unusual. Temperature dependence of MR (in a constant high field) above the magnetic ordering temperature, measured up to 100 K, exhibits a pronounced hump. The behavior of magnetoresistance at low temperatures is interpreted in terms of metamagnetism along with a short range ferromagnetic interaction.
URI: http://dx.doi.org/10.1103/PhysRevB.54.6069
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4710
http://hdl.handle.net/10054/4710
Date: 1996


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