In-plane thermal conductivity of [formula presented]: Evidence for magnon heat transport

R. Jin, Y. Onose, Y. Tokura, D. Mandrus, P. Dai, B. C. Sales

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We report the temperature and magnetic field dependence of the in-plane thermal conductivity ([Formula presented]) of high-quality monocrystalline [Formula presented]. Isothermal measurements of the field dependence of [Formula presented] at low temperatures ([Formula presented]) show no change in [Formula presented] below a critical magnetic field [Formula presented] ([Formula presented] for [Formula presented]) and [Formula presented] for [Formula presented]). Above [Formula presented], [Formula presented] more than doubles as [Formula presented] is increased to 9 T. At [Formula presented], there is a transition from a noncollinear to a collinear arrangement of the Nd and Cu spins and a collapse of the gap, [Formula presented], in an acoustic magnon branch at [Formula presented]. Closure of this gap appears to allow the conduction of substantial amounts of heat by acoustic magnons.

本文言語English
ジャーナルPhysical review letters
91
14
DOI
出版ステータスPublished - 2003
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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