Ferromagnetic rutile CoxTi1-xO2-δ heteroepitaxy on wurtzite GaN and ZnO

Yasushi Hirose, Taro Hitosugi, Junpei Kasai, Yutaka Furubayashi, Kiyomi Nakajima, Toyohiro Chikyow, Seiji Konuma, Toshihiro Shimada, Tetsuya Hasegawa

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1 Citation (Scopus)

Abstract

Rutile CoxTi1-xO2-δ (100) films were heteroepitaxially grown on GaN (0001) and ZnO (0001) by pulsed laser deposition. Magneto-optical Kerr effect measurements indicated that the Co xTi1-xO2-δ films grown at appropriate oxygen partial pressure show room-temperature ferromagnetism both on GaN (0001) and ZnO (0001) substrate. XRD and cross-sectional TEM measurements confirmed solid solution of Co in rutile TiO2 matrix without any precipitates and secondary phases. High-resolution TEM observation of the Co xTi1-xO2-δ/GaN interface revealed atomically smooth interface without intermixing, which promises the application of CoxTi1-xO2-δ in opto-spintronics devices as a spin injector.

Original languageEnglish
Pages (from-to)3104-3106
Number of pages3
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume5
Issue number9
DOIs
Publication statusPublished - 2008
Event34th International Symposium on Compound Semiconductors, ISCS-2007 - Kyoto, Japan
Duration: 2007 Oct 152007 Oct 18

ASJC Scopus subject areas

  • Condensed Matter Physics

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