Observation of spin reorientation in layered manganites La1.2Sr1.8(Mn1-yRuy)2O7 (0.0{less-than or slanted equal to}y{less-than or slanted equal to}0.2) by Lorentz transmission electron microscopy

X. Z. Yu, M. Uchida, Y. Onose, J. P. He, Y. Kaneko, T. Asaka, K. Kimoto, Y. Matsui, T. Arima, Y. Tokura

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10 Citations (Scopus)

Abstract

The effect of Ru substitution for Mn in bilayered oxides La1.2Sr1.8(Mn1-yRuy)2O7 ( 0 {less-than or slanted equal to} y {less-than or slanted equal to} 0.2) was investigated by magnetization measurements and low-temperature Lorentz transmission electron microscopy. It was found that the magnetic anisotropy is controlled by the Ru content y and temperature T. The easy axis changes from 〈1 1 0〉 for the y = 0 crystal to the c-axis for y = 0.2, and it rotates away from the c-axis for the y = 0.05 and y = 0.07 crystals with decreasing temperature. Furthermore, maze-shaped magnetic domain structures were observed in the (0 0 1) thin crystals with 0.05 {less-than or slanted equal to} y {less-than or slanted equal to} 0.2. Changes in domain size and structure indicate that the uniaxial magnetic anisotropy becomes stronger as Ru content y increases.

Original languageEnglish
Pages (from-to)391-396
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume302
Issue number2
DOIs
Publication statusPublished - 2006 Jul
Externally publishedYes

Keywords

  • Bilayered manganese oxides
  • Lorentz transmission electron microscopy
  • Magnetic anisotropy
  • Magnetic domains
  • Spin reorientation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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