Magnetic structure of βErD2: Long-range and short-range order from powder neutron diffraction

P. Vajda, G. André, T. J. Udovic, R. W. Erwin, and Q. Huang
Phys. Rev. B 71, 054419 – Published 25 February 2005

Abstract

Two parallel neutron powder diffraction investigations were performed on different specimens of ErD2 at the LLB (CEN, Saclay) and at NIST for the determination of its magnetic structure. It comprises, below TN=2.23K, two coexisting sinusoidally modulated antiferromagnetic (AF) configurations, M and M, with the respective incommensurate propagation vectors, k=(0.275,0.275,0.750), together with its third harmonic 3k, and k=(0.120,0.120,0.750). Contrary to other heavy rare-earth dideuterides, no commensurate AF configuration could be detected down to 120mK. On the other hand, similar to earlier observations on HoD2 and TbD2, magnetic short-range order (SRO) shows up near 1.5K in ErD2 after the disappearance of certain M lines. This SRO seems to correlate with the hexagonal γ-phase of the trideuteride and suggests an electronic phase separation with memory effects.

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  • Received 19 October 2004

DOI:https://doi.org/10.1103/PhysRevB.71.054419

©2005 American Physical Society

Authors & Affiliations

P. Vajda1, G. André2, T. J. Udovic3, R. W. Erwin3, and Q. Huang3

  • 1Laboratoire des Solides Irradiés, Ecole Polytechnique, F-91128 Palaiseau, France
  • 2Laboratoire Léon-Brillouin, CEA-Saclay, F-91191 Gif/Yvette, France
  • 3NIST Center for Neutron Research, Gaithersburg, Maryland 20899-8562, USA

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Issue

Vol. 71, Iss. 5 — 1 February 2005

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