Magnetic properties of the ferrimagnetic cobaltite CaBaCo4O7 |
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| Authors: | Zhe Qu Langsheng Ling Li Pi Yuheng Zhang |
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| Affiliation: | a High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui, 230031, Chinab Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China |
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| Abstract: | The magnetic properties of the ferrimagnetic cobaltite CaBaCo4O7 are systematically investigated. We find that the susceptibility exhibits a downward deviation below ∼360 K, suggesting the occurrence of short-range magnetic correlations at a temperature well above TC. The effective moment is determined to be  ., which is consistent with that expected for the Co2+/Co3+ high spin species. Using a criterion given by Banerjee [Phys. Lett. 12 (1964) 16], we demonstrate that the paramagnetic to ferrimagnetic transition in CaBaCo4O7 has a first order character. |
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| Keywords: | A. Magnetically ordered materials D. Phase transitions |
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