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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4424

Title: Positive giant magnetoresistance in antiferromagnetic RE(2)Ni(3)Si(5) (RE=Tb, Sm, Nd)
Authors: MAZUMDAR, C
NIGAM, AK
NAGARAJAN, R
GODART, C
GUPTA, LC
PADALIA, BD
CHANDRA, G
VIJAYARAGHAVAN, R
Keywords: ce2ni3si5
Issue Date: 1996
Publisher: AMER INST PHYSICS
Citation: APPLIED PHYSICS LETTERS, 68(25), 3647-3649
Abstract: Positive giant magnetoresistance (GMR), Delta rho/rho, is reported here in polycrystalline antiferromagnetic materials RE(2)Ni(3)Si(5) (RE=Tb, Sm, Nd); Delta rho/rho, at 4.4 K and in a field of 45 kOe, is 85%, 75%, and 58%, respectively. Positive GMR of such large magnitude has not been reported earlier in magnetically ordered polycrystalline compounds. The observed GMR is not correlated to the RE-moments. It is, however, associated with the magnetic ordering of the lattice as its magnitude is significantly reduced in the paramagnetic state. Surprisingly, MR in Y2Ni3Si5, a non-magnetic rare earth analogue, is also relatively large (16% at 4.4 K; 45 kOe) and is even slightly higher than that of antiferromagnetically ordered Gd2Ni3Si5 (12% at 4.4 K; 45 kOe). The layered structure of the materials is suggested to be responsible for the observed GMR. (C) 1996
URI: http://dx.doi.org/10.1063/1.115758
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4424
http://hdl.handle.net/10054/4424
ISSN: 0003-6951
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