Coexistence of localized and (induced) itinerant magnetism and heat-capacity anomalies in Gd1−xYxNi alloys

Mallik, R. ; Paulose, P. L. ; Sampathkumaran, E. V. ; Patil, S. ; Nagarajan, V. (1997) Coexistence of localized and (induced) itinerant magnetism and heat-capacity anomalies in Gd1−xYxNi alloys Physical Review B: Condensed Matter and Materials Physics, 55 (13). pp. 8369-8373. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v55/i13/p8369_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.55.8369

Abstract

The results of magnetization (M), electrical resistivity (ρ), and heat-capacity (C) measurements for the alloys, Gd1−xYxNi, are reported. The X-ray-diffraction patterns indicate that there is a change in the crystal structure from CrB-type to FeB-type orthorhombic structure for increasing x near x=0.4. GdNi has been known to order ferromagnetically at 70 K and the observed x dependence of TC and θρ proves that the strength of Gd-Gd exchange interaction is enhanced by a factor of about 1.5 in the FeB structure. The M data suggest that there is an excess moment for the Gd-rich alloys. The observed magnetization behavior is taken as an evidence to show that there is coexistence of localized magnetism (from Gd) and itinerant ferromagnetism of induced-type, presumably from Ni 3d band. There is an enhancement of C with decreasing temperature above TC over a wide temperature range presumably due to short-range order effects in these alloys.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:45652
Deposited On:29 Jun 2011 03:22
Last Modified:18 May 2016 01:51

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