High-temperature critical susceptibility of gadolinium

G. H. J. Wantenaar, S. J. Campbell, D. H. Chaplin, T. J. McKenna, and G. V. H. Wilson
Phys. Rev. B 29, 1419 – Published 1 February 1984
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Abstract

Low-field ac critical magnetic susceptibility measurements on a variety of toroidal samples of polycrystalline gadolinium are reported. The use of transient enhancement and temperature modulation of the ac susceptibility in bulk studies of critical magnetic behavior is discussed. Consistent values of γ=1.24±0.02 and χ0=0.0105±0.0005 (relative susceptibility) are obtained for samples of varying purities and using different analytical techniques. The observation of a well-defined temperature range of ∼7 K for critical behavior in ∼99-wt.% pure samples and in low (<130 A m1) magnetic fields is consistent with recent theoretical studies of the effects upon critical magnetic susceptibility of a distribution in ordering temperature and demagnetizing fields.

  • Received 18 May 1982

DOI:https://doi.org/10.1103/PhysRevB.29.1419

©1984 American Physical Society

Authors & Affiliations

G. H. J. Wantenaar, S. J. Campbell*, D. H. Chaplin, T. J. McKenna, and G. V. H. Wilson

  • Department of Physics, Faculty of Military Studies, University of New South Wales, Duntroon, Australian Capital Territory 2600, Australia

  • *Present address: Department of Solid State Physics, Research School of Physical Sciences, Australian National University, Canberra, Australian Capital Territory 2600, Australia.

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Vol. 29, Iss. 3 — 1 February 1984

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