TY - JOUR

T1 - In-plane thermal conductivity of [formula presented]

T2 - Evidence for magnon heat transport

AU - Jin, R.

AU - Onose, Y.

AU - Tokura, Y.

AU - Mandrus, D.

AU - Dai, P.

AU - Sales, B. C.

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevLett.91.146601

DO - 10.1103/PhysRevLett.91.146601

M3 - Article

AN - SCOPUS:85038300075

SN - 0031-9007

VL - 91

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

ER -