Perpendicular magnetic anisotropy and strong magneto-optic properties of SrRuO3 epitaxial films

L. Klein, J. S. Dodge, T. H. Geballe, A. Kapitulnik, A. F. Marshall, L. Antognazza, K. Char

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

Epitaxial films of the ferromagnetic perovskite SrRuO3 were measured with a bulk magnetometer and with a local magneto-optic Sagnac interferometer in transmission and in reflection. We find a magnetic easy axis perpendicular to the films, and for saturated remanent magnetization along this direction the Faraday rotation and the Kerr rotation at λ=840 nm are about 0.75×105 deg/cm and 0.85°, respectively. The temperature dependence of the remanent magnetization in the low temperature limit is dominated by spin-wave excitations, yielding a notable decrease with T3/2. Using Sagnac-Kerr scanning and transmission electron microscopy imaging we correlate the coercivity with the grain size.

Original languageEnglish
Pages (from-to)2427
Number of pages1
JournalApplied Physics Letters
DOIs
StatePublished - 1995
Externally publishedYes

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