Phase transition in ultrathin magnetic dots

Authors
Marty, F Vaterlaus, A Maier, U Pescia, D
Citation
F. Marty et al., Phase transition in ultrathin magnetic dots, J APPL PHYS, 87(9), 2000, pp. 5099-5101
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
87
Issue
9
Year of publication
2000
Part
2
Pages
5099 - 5101
Database
ISI
SICI code
0021-8979(20000501)87:9<5099:PTIUMD>2.0.ZU;2-V
Abstract
We have measured the magnetization of in-plane magnetized ultrathin magneti c dots of Co on Cu(100) as a function of temperature and applied field by s canning Kerr microscopy. Co dots with lateral sizes down to 4 mu m and a th ickness of 1.8 atomic layers show a sharp magnetic phase transition which i s indistinguishable from the one of extended films. The scaling plot sugges ts that these small particles belong to the Ising universality class. (C) 2 000 American Institute of Physics. [S0021-8979(00)36808-6].