Heat transport in a nuclear antiferromagnet

D. D. Osheroff; Y. P. Feng; P. Schiffer

doi:10.1016/0921-4526(91)90230-C

Heat transport in a nuclear antiferromagnet

D. D. Osheroff, Y. P. Feng, P. Schiffer

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We report the first measurements of heat transport due to thermal magnons in mono-domain single crystals of U2D2 ³He. Between about 0.95T_c and 0.65T_c we find clear evidence for umklapp scattering with an activation energy of 5.8±0.3 mK, with a much weaker temperature dependence at lower T. Our limiting mean free paths varied from 0.3 μm to 3 μm depending upon crystal orientation. We have also measured the thermal resistance between the U2D2 solid and the bulk B superfluid phase between 0.35 mK and 0.6 mK, where we find an activated conductivity with an energy of 4.5±0.3 mK. The heat path involves both the solid-liquid boundary resistance and the resistance of superfluid in a 1 mm diameter tube.

Original language	English (US)
Pages (from-to)	204-208
Number of pages	5
Journal	Physica B: Physics of Condensed Matter
Volume	169
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(91)90230-C
State	Published - Feb 2 1991
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(91)90230-C

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@article{1efa1acc7bc5459392522113edfdf74b,

title = "Heat transport in a nuclear antiferromagnet",

abstract = "We report the first measurements of heat transport due to thermal magnons in mono-domain single crystals of U2D2 3He. Between about 0.95Tc and 0.65Tc we find clear evidence for umklapp scattering with an activation energy of 5.8±0.3 mK, with a much weaker temperature dependence at lower T. Our limiting mean free paths varied from 0.3 μm to 3 μm depending upon crystal orientation. We have also measured the thermal resistance between the U2D2 solid and the bulk B superfluid phase between 0.35 mK and 0.6 mK, where we find an activated conductivity with an energy of 4.5±0.3 mK. The heat path involves both the solid-liquid boundary resistance and the resistance of superfluid in a 1 mm diameter tube.",

author = "Osheroff, {D. D.} and Feng, {Y. P.} and P. Schiffer",

note = "Funding Information: We wish to acknowledge many useful conversations with Mike Cross and Daniel Fisher regarding this work, and contributions to the experiment by Jim Mihalisin and Wentao Pan. We also gratefully acknowledge the loan of equipment used in this experiment from AT&T Bell Laboratories. This work was supported by the NSF under grant DMR-8803301.",

year = "1991",

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doi = "10.1016/0921-4526(91)90230-C",

language = "English (US)",

volume = "169",

pages = "204--208",

journal = "Physica B: Physics of Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "1-4",

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TY - JOUR

T1 - Heat transport in a nuclear antiferromagnet

AU - Osheroff, D. D.

AU - Feng, Y. P.

AU - Schiffer, P.

N1 - Funding Information: We wish to acknowledge many useful conversations with Mike Cross and Daniel Fisher regarding this work, and contributions to the experiment by Jim Mihalisin and Wentao Pan. We also gratefully acknowledge the loan of equipment used in this experiment from AT&T Bell Laboratories. This work was supported by the NSF under grant DMR-8803301.

PY - 1991/2/2

Y1 - 1991/2/2

N2 - We report the first measurements of heat transport due to thermal magnons in mono-domain single crystals of U2D2 3He. Between about 0.95Tc and 0.65Tc we find clear evidence for umklapp scattering with an activation energy of 5.8±0.3 mK, with a much weaker temperature dependence at lower T. Our limiting mean free paths varied from 0.3 μm to 3 μm depending upon crystal orientation. We have also measured the thermal resistance between the U2D2 solid and the bulk B superfluid phase between 0.35 mK and 0.6 mK, where we find an activated conductivity with an energy of 4.5±0.3 mK. The heat path involves both the solid-liquid boundary resistance and the resistance of superfluid in a 1 mm diameter tube.

AB - We report the first measurements of heat transport due to thermal magnons in mono-domain single crystals of U2D2 3He. Between about 0.95Tc and 0.65Tc we find clear evidence for umklapp scattering with an activation energy of 5.8±0.3 mK, with a much weaker temperature dependence at lower T. Our limiting mean free paths varied from 0.3 μm to 3 μm depending upon crystal orientation. We have also measured the thermal resistance between the U2D2 solid and the bulk B superfluid phase between 0.35 mK and 0.6 mK, where we find an activated conductivity with an energy of 4.5±0.3 mK. The heat path involves both the solid-liquid boundary resistance and the resistance of superfluid in a 1 mm diameter tube.

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U2 - 10.1016/0921-4526(91)90230-C

DO - 10.1016/0921-4526(91)90230-C

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SN - 0921-4526

VL - 169

SP - 204

EP - 208

JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

IS - 1-4

ER -

Heat transport in a nuclear antiferromagnet

Abstract

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