Experiments on the superconductive transition

Author:

Abstract

The change of electrical resistivity at the transition between the superconductive and the normal state in a longitudinal magnetic field has been investigated systematically. By successive elimination of a number of disturbing factors an experimental procedure has been developed which yields consistent and reproducible results. The metals lead, mercury and tin have been investigated in this manner. Contrary to the accepted view it has been found that under ‘ideal’ conditions the transition is not discontinuous. There exists a range of temperature and magnetic field in which the resistance changes gradually from normal to zero and vice versa. The extent of this transition region was found to grow' rapidly with increasing absolute value of the magnetic field. Under conditions closely approximating the ‘ideal’ longitudinal case transitions with hysteresis were never observed. However, it could be shown that resistance hysteresis and discontinuous resistive changes are produced by deviation from the longitudinal case owing to unsuitable geometrical shape of the specimen. The general conclusion has therefore been reached that the resistance of a pure superconductor in a longitudinal field changes continuously in transition between the superconductive and the normal state. The significance of the results has been discussed and further experiments have been proposed.

Publisher

The Royal Society

Subject

Pharmacology (medical)

Reference6 articles.

1. Andrew E. R. 1947 Phys. Soc.Camb. Conf. Rep. (2) p. 101.

2. Appleyard E. T. S. Bristow J. R. London H. & Misener A. D. iq-jq Pro-. Roy. Soc A 172 540.

3. Becker R. Heller G. & Sauter F. 1933

4. II. The threshold and equilibrium curves of supraconductors

5. LXX.Thermodynamical properties of some supraconductors

Cited by 17 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Elektrische Leitfähigkeit von Metallen und festen Ionenleitern;Landolt-Börnstein;2013

2. Superconductivity and superconducting Materials;Canadian Metallurgical Quarterly;1972-04

3. Experimentelle Aspekte der Supraleitung Zweiter Art;Vorträge über Supraleitung;1968

4. Type II superconductors;Reports on Progress in Physics;1966-07-01

5. Les supraconducteurs de la deuxieme espece du systeme plomb-thallium;Journal of Physics and Chemistry of Solids;1965-07

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3