EVIDENCE FOR NUCLEAR ANTIFERROMAGNETISM IN COPPER

被引：32

作者：

EHNHOLM, GJ

EKSTROM, JP

JACQUINOT, JF

LOPONEN, MT

LOUNASMAA, OV

SOINI, JK

机构：

[1] Low Temperature Laboratory, Helsinki University of Technology

[2] Centre d'Etudes Nucléaires de Saclay

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 42卷 / 25期

基金：

芬兰科学院;

关键词：

D O I：

10.1103/PhysRevLett.42.1702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied, in a two-stage nuclear demagnetization cryostat, the NMR properties of copper nuclei in magnetic fields from 0 to 15 mT and at polarizations up to 0.9. In zero field the spin entropy decreases less rapidly with temperature than expected for an interacting paramagnet with a constant local field; at 50 nK the entropy is still 45% of R ln4. The temperature dependence of magnetic susceptibility points to nuclear antiferromagnetism in copper. © 1979 The American Physical Society.

引用

页码：1702 / 1705

页数：4

共 11 条

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