Magnetic impurity effect on charge and magnetic order in doped La 1.5Ca 0.5CoO 4

Kazumasa Horigane, H. Hiraka, K. Tomiyasu, K. Ohoyama, D. Louca, K. Yamada

Research output: Contribution to journalArticle

Abstract

Neutron scattering experiments were performed on single crystals of magnetic impurity doped cobalt oxides La 1.5Ca 0.5CoO 4 to characterize the charge and spin orders. We newly found contrasting impurity effects. Two types of magnetic peaks are observed at q=(0.5,0,L) with L=half-integer and integer in La 1.5Ca 0.5CoO 4, while magnetic peak at L=half-integer (integer) was only observed in Mn (Fe)-substituted sample. Although Mn and Fe impurities degrade charge and magnetic order, Cr impurity stabilizes the ordering at x=0.5. Based on the crystal structural analysis of Cr doped sample, we found that the excess oxygen and change of octahedron around Co 3+ were realized in Cr doped sample.

Original languageEnglish
Article number012061
JournalJournal of Physics: Conference Series
Volume340
DOIs
Publication statusPublished - 2012
Externally publishedYes

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integers
impurities
cobalt oxides
structural analysis
neutron scattering
single crystals
oxygen
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Magnetic impurity effect on charge and magnetic order in doped La 1.5Ca 0.5CoO 4 . / Horigane, Kazumasa; Hiraka, H.; Tomiyasu, K.; Ohoyama, K.; Louca, D.; Yamada, K.

In: Journal of Physics: Conference Series, Vol. 340, 012061, 2012.

Research output: Contribution to journalArticle

Horigane, Kazumasa ; Hiraka, H. ; Tomiyasu, K. ; Ohoyama, K. ; Louca, D. ; Yamada, K. / Magnetic impurity effect on charge and magnetic order in doped La 1.5Ca 0.5CoO 4 . In: Journal of Physics: Conference Series. 2012 ; Vol. 340.
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AU - Louca, D.

AU - Yamada, K.

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