Effect of growth temperature on Curie temperature of magnetic ultrathin films Co/Cu(100)

C. C. Kuo, Wen-Chin Lin, C. L. Chiu, H. L. Huang, Minn Tsong Lin

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

The magnetic and structural properties were investigated for the 2 ML Co/Cu(100) films grown at various temperatures from 125 to 350 K. By precisely controlling the film thickness, the influence of thickness on Curie temperature (TC) due to the finite size effect can be excluded. The Curie temperature of the 2 ML Co keeps almost invariant for the growth temperature (Tg) below 250 K, and drops drastically at Tg, higher than 275 K. For Tg = 340 K, TC dropped to 170 K which is only about half of 325 K for Tg = 125 K. Accompanied with the increase of TC for the films grown at lower temperatures, the remanent Kerr signal as well as coercivity were enhanced. According to a simple theoretical estimation, the change of TC due to the variation of the magnetization and anisotropy was found to be consistent with the experimental results. The enhancement in TC or magnetization and anisotropy with various Tg should be traced back to the presence of island growth in the films grown at lower temperatures.

Original languageEnglish
Pages (from-to)7153-7155
Number of pages3
JournalJournal of Applied Physics
Volume89
Issue number11 II
DOIs
Publication statusPublished - 2001 Jun 1
Event8th Joint Magnetism and Magnetic Materials-Intermag Conference - San Antonio, TX, United States
Duration: 2001 Jan 72001 Jan 11

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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