用于磁电测量的超导量子干涉装置设置

Superconducting quantum interference device setup for magnetoelectric measurements.

作者信息

Borisov P, Hochstrat A, Shvartsman V V, Kleemann W

机构信息

Angewandte Physik, Universität Duisburg-Essen, 47048 Duisburg, Germany.

出版信息

Rev Sci Instrum. 2007 Oct;78(10):106105. doi: 10.1063/1.2793500.

DOI:10.1063/1.2793500

PMID:17979461

Abstract

A commercial superconducting quantum interference device (SQUID) setup (MPMS 5S from Quantum Design), equipped with a magnetic ac susceptibility option, is modified for measurements of the linear magnetoelectric (ME) effect, i.e., of the magnetic moment induced by an applied external electric field in a ME sample. Test measurements on a Cr(2)O(3) (111) single crystal are in excellent agreement with previously reported data of its ME susceptibility. The main advantages of the proposed setup are the improved precision due to the high sensitivity of the SQUID magnetometer in combination with the lock-in technique and a relatively simple experimental realization.

摘要

一种配备了交流磁化率选项的商用超导量子干涉装置（SQUID）（来自量子设计公司的MPMS 5S）经过改装，用于测量线性磁电（ME）效应，即在磁电样品中由外部施加电场感应产生的磁矩。对Cr(2)O(3) (111) 单晶进行的测试测量结果与先前报道的其磁电磁化率数据高度吻合。所提出的装置的主要优点是，由于SQUID磁力计的高灵敏度与锁相技术相结合，精度得到了提高，并且实验实现相对简单。