SPIN-GLASS FORMATION IN Co_2RuO_4.

摘要

Magnetic susceptibility and powder neutron diffraction results are reported on the cubic spinel Co_2RuO_4. These measurements indicate spin-glass fOrmation in this compound, with a freezing temperature of about 16 K. Magnetic susceptibility results are also reported on ZnCoRuO_4, a spinel in which only the Ru~3+ ions are magnetic. No magnetic order was found in ZnCoRuO_4 down to 2 K, indicating extremely weak interactions between the octahedral Rua~3+ ions in these materials.