Size effect and temperature dependence of spin conduction in Gd/SiN ultrathin film

Atushi Horiguchi, Tomokazu Matsuda, Yukio Watanabe

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

The possibility of enhancing the resistivity while preserving magnetism is investigated by growing metal/insulator trilayers and superlattices, where the metal is Gd and the insulator is amorphous Si3N4 for the first time. A large size effect on Curie temperature (TC) is found in the susceptibility in contrast with Gd epitaxially grown on metals. TC decreases to 180 K, i.e., 70% of the bulk TC in 10 nm thick Gd film, which is attributed to an electrical isolation and surface states. On the other hand, the susceptibility χ at TC is almost unchanged as in epitaxial Gd on metal. The resistivity R doubled as the Gd layer thickness decreases from 100 to 10 nm, and the TC estimated from R agrees with that from χ. Additionally, a possible interlayer coupling or an effect of surface layers adjacent to Si3N4 was detected in superlattices.

Original languageEnglish
Pages (from-to)6603-6605
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
DOIs
Publication statusPublished - May 1 2000
Externally publishedYes
Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
Duration: Nov 15 1999Nov 18 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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