This article is cited in 21 papers

Magnetism

Effect of the diamagnetic dilution on the magnetic ordering and electrical conductivity in the Co$_3$O$_2$BO$_3$: Ga ludwigite

N. B. Ivanova^ab, M. S. Platunov^bc, Yu. V. Knyazev^a, N. V. Kazak^b, L. N. Bezmaternykh^b, A. D. Vasil'ev^ab, S. G. Ovchinnikov^abc, V. I. Nizhankovskii<sup>d

a</sup> Siberian Federal University, Krasnoyarsk
^b L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk
^c M. F. Reshetnev Siberian State Aerospace University,
^d International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland

Abstract: Single crystals of cobalt ludwigite Co$_3$O$_2$BO$_3$ with diamagnetic substitution of Ga$^{3+}$ ions for a part of the cobalt ions have been grown by the flux method. A detailed investigation of the crystal structure and magnetic properties of the compound has been carried out. A preferred character of the occupation of nonequivalent crystallographic positions by gallium has been revealed. It has been found that the effective magnetic moment and the magnetic ordering temperature are decreased compared to those in the original crystal of the Co$_3$O$_2$BO$_3$ ludwigite. It has been noted that the pronounced magnetic anisotropy observed in the crystallographic $ab$ plane of the original material of the Co$_3$O$_2$BO$_3$ composition disappears in the presence of gallium.

Received: 06.03.2012

 English version: Physics of the Solid State, 2012, 54:11, 2212–2221

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