Repeated magnetic compensation behaviour in Nd0.75Gd0.25Rh3B2 alloy having hexagonal structure and planar anisotropy

The results of dc and ac magnetization, electrical resistance and heat capacity studies in an admixed rare earth alloy Nd0.75Gd0.25Rh3B2, which is close to the zero magnetization limit, are reported. Novel observations include the two antiferromagnetic like transitions, concomitant repeated/multiple...

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Bibliographic Details
Published in:arXiv.org 2008-08
Main Authors: Kulkarni, Prasanna D, Vaidya, U V, Rakhecha, V C, Thamizhavel, A, Dhar, S K, Nigam, A K, Ramakrishnan, S, Grover, A K
Format: Article
Language:English
Subjects:
Anisotropy
Antiferromagnetism
Coercivity
Compensation
Conduction electrons
Crossovers
Electronic structure
Magnetism
Magnetization
Rare earth alloys
Remanence
Temperature dependence
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Summary:The results of dc and ac magnetization, electrical resistance and heat capacity studies in an admixed rare earth alloy Nd0.75Gd0.25Rh3B2, which is close to the zero magnetization limit, are reported. Novel observations include the two antiferromagnetic like transitions, concomitant repeated/multiple magnetic compensation behaviour and a characteristic oscillatory magnetic response, with temperature dependence of magnetization at low fields crossing the M = 0 axis thrice. The effective coercive field relating to the residual remanence also has an oscillatory response, with two minima located close to two zero-crossover temperatures. The unusual behavior in Nd0.75Gd0.25Rh3B2 is conjectured to arise from its anisotropic hexagonal structure, with planar anisotropy, resulting in a quasi one dimensional electronic structure and the accentuated role of conduction electron polarization near the zero magnetization limit.
ISSN:2331-8422
DOI:10.48550/arxiv.0805.3412