Valence states and metamagnetic phase transition in partially B-site-disordered 
perovskite EuMn0.5Co0.5O3

Vasiliev, A. N.; Volkova, O. S.; Lobanovskii, L. S.; Troyanchuk, I. O.; Hu , Z.; Tjeng, L. H.; Khomskii, D. I.; Lin, H. -J.; Chen, C. T.; Tristan, N.; Kretzschmar, F.; Klingeler, R.; Büchner, B.

doi:10.1103/PhysRevB.77.104442

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Valence states and metamagnetic phase transition in partially B-site-disordered perovskite EuMn_0.5Co_0.5O₃

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Citation

Vasiliev, A. N., Volkova, O. S., Lobanovskii, L. S., Troyanchuk, I. O., Hu, Z., Tjeng, L. H., et al. (2008). Valence states and metamagnetic phase transition in partially B-site-disordered perovskite EuMn_0.5Co_0.5O₃. Physical Review B, 77(10): 104442, pp. 1-5. doi:10.1103/PhysRevB.77.104442.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-0F6C-F

Abstract

The valence states of transition metals were studied by measuring the x-ray absorption spectra at both Mn L-2,L-3 and Co L-2,L-3 edges of partially B-site-disordered perovskite EuMn0.5Co0.5O3. By comparison with analogous spectra in various Co- and Mn-based compounds, the divalent state of the Co ions and the tetravalent state of the Mn ions were established analogous toMn(4+)/Co2+ charge ordering found by Dass and Goodenough [Phys. Rev. B 67, 014401 (2003)] in LaMn0.5Co0.5O3. The specific heat and magnetic susceptibility data indicate the formation of the magnetically ordered state at T-C similar to 120 K. The first-order metamagnetic transitions seen in EuMn0.5Co0.5O3 at T < T-C suggest the existence of antiferromagnetic and/or paramagnetic clusters embedded into the ferromagnetic matrix.