SPONTANEOUS MAGNETIZATION AND ANTIFERROMAGNETIC CORRELATIONS OF THE CUO2 CHAINS IN SR0.73CUO2

Authors
SHENGELAYA A MEIJER GI KARPINSKI J ZHAO GM SCHWER H KOPNIN EM ROSSEL C KELLER H
Citation
A. Shengelaya et al., SPONTANEOUS MAGNETIZATION AND ANTIFERROMAGNETIC CORRELATIONS OF THE CUO2 CHAINS IN SR0.73CUO2, Physical review letters, 80(16), 1998, pp. 3626-3629
Citations number
27
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
16
Year of publication
1998
Pages
3626 - 3629
Database
ISI
SICI code
0031-9007(1998)80:16<3626:SMAACO>2.0.ZU;2-7
Abstract
We have studied magnetic properties of the novel quasi-one-dimensional cuprate Sr0.73CuO2, containing edge-sharing CuO2 chains. This compoun d can be described as an alternating-chain Heisenberg antiferromagnet. The CuO2 chains are hole doped with a high hole concentration (simila r to 0.6/CuO2), and each hole renders the CuO2 unit nonmagnetic. The e xperiments reveal that Sr0.73CuO2 develops a long-range magnetic order at 12 K with a small spontaneous ferromagnetic moment M-c = 3.2(2) X 10(-3) mu(B)/Cu. The observation of long-range magnetic order in CuO2 chains doped with a substantial number of holes is very surprising.