Magnetoresistance below 1 K and temperature cycling of ruthenium oxide-bismuth ruthenate cryogenic thermometers

被引：18

作者：

Goodrich, RG ^{[1
]}

Hall, D

Palm, E

Murphy, T

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

来源：

CRYOGENICS | 1998年 / 38卷 / 02期

基金：

美国国家科学基金会;

关键词：

cryogenic thermometers; RuO thermometers; magnetoresistance; temperature cycling;

D O I：

10.1016/S0011-2275(97)00100-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The magnetic field dependence of the resistance of commercial 1000 Omega thick film chip resistors between 0.03 and 0.6 K in fields from zero to 18T for five resistors and up to 32 T for one of those five shows both a positive and a negative magnetoresistance that is temperature dependent. In the field range between 4 and 32 T, and over the temperature measurement range, the resistance is proportional to B-1/2, and once an individual thermometer is calibrated, it can easily be used to determine the temperature at any field within the range. Measurements of the effect of repeated thermal cycling of these resistors from 300 to 77 and 4.2 K show that the resistance continually changes up to 120 cycles to 77 K or below then becomes stable. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：221 / 225

页数：5

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