Magnetic Density of States at Low Energy in Geometrically Frustrated Systems

2005/06/17 by A. Yaouanc, P. Dalmas de Réotier, P. Dalmas de Reotier +11 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Multiferroics and related materials #Nuclear materials and radiation effects #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.95.047203

published as Phys. Rev. Lett. 95, 047203 (2005) · 5 pages, two figures

arxiv created 2005/06/17 · openalex publication_date 2005/07/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Using muon-spin-relaxation measurements we show that the pyrochlore compound Gd(2)Ti(2)O(7), in its magnetically ordered phase below approximately 1 K, displays persistent spin dynamics down to temperatures as low as 20 mK. The characteristics of the induced muon relaxation can be accounted for by a scattering process involving two magnetic excitations, with a density of states characterized by an upturn at low energy and a small gap depending linearly on the temperature. We propose that such a density of states is a generic feature of geometrically frustrated magnetic materials.

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