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We report the results of dc and ac magnetization measurements as a functionof temperature (1.8 - 300 K) for the spin chain compound, Ca$_3$CoRhO$_6$,which has been recently reported to exhibit a partially disorderedantiferromagnetic (PDAF) structure in the range 30 - 90 K and spin-glassfreezing below 30 K. We observe an unexpectedly large frequency dependence ofac susceptibility in the T range 30 - 90 K, typical of superparamagnets. Inaddition, we find that there is no difference in the isothermal remanentmagnetization behavior for the two regimes below 90 K. These findings call formore investigations to understand the magnetism of this compound.Comment: 4 pages, 3 figure

physical review. b, condensed matter

Superparamagnetic-like ac susceptibility behavior in the partially disordered antiferromagnetic compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CoRhO</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Superparamagnetic-like ac susceptibility behavior in the partially disordered antiferromagnetic compoundCa3CoRhO6