Cluster glass behavior of frustrated birnessites AxMnO2*yH2O (A = Na, K)

Abstract

We report on the synthesis and magnetic properties of frustrated Na0.22MnO2*0.39H2O and K0.6MnO2*0.48H2O with the birnessite structure. The structure, static and dynamic magnetic properties of the compounds are investigated in detail. A combination of DC and AC magnetic susceptibility measurements and magnetization decay measurements reveal cluster glass behavior below the freezing temperature of 4 K for Na-birnessite and 6 K for K-birnessite. The frequency dependence of the freezing temperature is analyzed on the basis of dynamic scaling laws including the critical slowing down formula and the Vogel-Fulcher law, which further confirm cluster glass formation in both compounds.

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Cited by in corpus (3)

• Static and dynamic magnetic properties of K3CrO4
• Structural modulation in potassium birnessite single crystals
• Magnetic phase diagram and cluster glass-like properties of stage-1 graphite intercalated FeCl${}_3$