Magnetic impurity effect on charge and magnetic order in doped La 1.5Ca0.5CoO4

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

Research output: Contribution to journalConference article

Abstract

Neutron scattering experiments were performed on single crystals of magnetic impurity doped cobalt oxides La1.5Ca0.5CoO 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 La1.5Ca 0.5CoO4, 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 Co3+ were realized in Cr doped sample.

Original languageEnglish
Article number012061
JournalJournal of Physics: Conference Series
Volume340
DOIs
Publication statusPublished - Jan 1 2012
Event5th European Conference on Neutron Scattering, ECNS 2011 - Prague, Czech Republic
Duration: Jul 17 2011Jul 21 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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