A compact capacitive dilatometer for thermal expansion and magnetostriction measurements at millikelvin temperatures

被引：10

作者：

Abe, Satoshi ^{[1
]}

Sasaki, Fumishi ^{[1
]}

Oonishi, Takanobu ^{[1
]}

Inoue, Daiki ^{[1
]}

Yoshida, Jun ^{[1
]}

Takahashi, Daisuke ^{[2
]}

Tsujii, Hiroyuki ^{[1
,3
]}

Suzuki, Haruhiko ^{[1
]}

Matsumoto, Koichi ^{[1
]}

机构：

[1] Kanazawa Univ, Fac Sci, Dept Phys, Kanazawa, Ishikawa 9201192, Japan

[2] RIKEN, Low Temp Phys Lab, Wako, Saitama, Japan

[3] Kanazawa Univ, Fac Educ, Dept Phys, Kanazawa, Ishikawa 9201192, Japan

来源：

CRYOGENICS | 2012年 / 52卷 / 10期

关键词：

Thermal expansion; Magnetostriction; Capacitive dilatometer; Capacitance bridge; Low temperatures; CERU2SI2;

D O I：

10.1016/j.cryogenics.2012.04.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We describe a compact capacitive dilatometer for measuring thermal expansion and magnetostriction below 1 K using a home-made capacitance bridge with long-term stability of Delta C/C similar to 1.6 x 10(-7). We measured the thermal expansion and magnetostriction of a heavy-Fermion compound CeRu2Si2 and those of a standard copper sample to clarify the dilatometer cell effect. The temperature-dependent cell effect of our dilatometer, Delta L/L, was less than 10(-8) below 0.2 K. The magnetic-field-dependent cell effect was not observed below 52.6 mT at 85 mK, and was less than -2 x 10(-9) up to 10 T at 4.2 K. Our dilatometer provides precise thermal expansion and magnetostriction measurements at millikelvin temperatures. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：452 / 456

页数：5

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