首页 | 本学科首页   官方微博 | 高级检索  
     


Finite-size effect on magnetic ordering temperatures in long-period antiferromagnets: holmium thin films
Authors:Weschke E  Ott H  Schierle E  Schüssler-Langeheine C  Vyalikh D V  Kaindl G  Leiner V  Ay M  Schmitte T  Zabel H  Jensen P J
Affiliation:Institut für Experimentalphysik, Freie Universit?t Berlin, Arnimallee 14, D-14195 Berlin, Germany. eugen.weschke@physik.fu-berline.de
Abstract:The thickness dependence of the helical antiferromagnetic ordering temperature T(N) was studied for thin Ho metal films by resonant magnetic soft x-ray and neutron diffraction. In contrast with the Curie temperature of ferromagnets, T(N) was found to decrease with film thickness d according to [T(N)(infinity)-T(N)(d)]/T(N)(d) proportional variant (d-d(0))(-lambda(')), where lambda(') is a phenomenological exponent and d(0) is of the order of the bulk magnetic period L(b). These observations are reproduced by mean-field calculations that suggest a linear relationship between d(0) and L(b) in long-period antiferromagnets.
Keywords:
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号