Abstract
Structural, magnetic, and thermoelectric properties of Ho{sub 1/3}Sr{sub 2/3}CoO{sub 3-{delta}} have been studied within the oxygen content range 2.67<3-{delta}<2.80. The studied samples demonstrate antiferromagnetic order (G type) and semiconductive behavior. No ferromagnetic ordering has been observed in contrary to a recent study [A. Maignan et al., J. Solid State Chem. 178, 868 (2005)] on a closely related Sr{sub 2/3}Y{sub 1/3}CoO{sub 3-{delta}} with almost identical oxygen contents. We conclude that the high degree of both cation and oxygen vacancy ordering determines the observed properties of this material via strong localization of Co{sup 3+} electrons.
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