TY - JOUR
T1 - Magnetic impurity effect on charge and magnetic order in doped La 1.5Ca0.5CoO4
AU - Horigane, K.
AU - Hiraka, H.
AU - Tomiyasu, K.
AU - Ohoyama, Kenji
AU - Louca, D.
AU - Yamada, K.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/340/1/012061
DO - 10.1088/1742-6596/340/1/012061
M3 - Conference article
AN - SCOPUS:84858611018
VL - 340
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012061
T2 - 5th European Conference on Neutron Scattering, ECNS 2011
Y2 - 17 July 2011 through 21 July 2011
ER -