Thermal conductivity of normal liquid 3He in aerogel

被引：10

作者：

Reeves, PA ^{[1
]}

Tvalashvili, G ^{[1
]}

Fisher, SN ^{[1
]}

Guénault, AM ^{[1
]}

Pickett, GR ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2002年 / 129卷 / 3-4期

基金：

英国工程与自然科学研究理事会;

关键词：

Quartz; Thermal Conductivity; Helium; Measured Temperature; Magnetic Material;

D O I：

10.1023/A:1020848207432

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report thermal conductivity measurements for normal phase liquid He-3 inside 98 and 95% aerogels at dilution refrigerator temperatures (5 to 50 mK). In our measurements we use cylindrical samples of aerogel which have been fabricated inside quartz tubes. Each tube is enclosed at one end by a small chamber to which a known heat input is applied at a measured temperature. The other end is in an open volume of helium which is heat sunk to the refrigerator. Vibrating wire thermometry is used to measure the helium temperatures. The thermal conductivity measurements show clearly the effects of quasiparticle-"impurity" scattering, from which values of the mean free path are derived. These are 92 nm for the 98% aerogel and 56 nm for the 95% sample.

引用

页码：185 / 193

页数：9

共 11 条

[1] THERMAL CONDUCTIVITY OF PURE HE3 AND OF DILUTE SOLUTIONS OF HE3 IN HE4 AT LOW TEMPERATURES [J].