NDLI: Soft X-ray synchrotron radiation spectroscopy study of the Co$_{0.6}$Fe$_{0.9}$Mn$_{1.5}$O$_{4}$ spinel with nano-checkerboard patterns

Content Provider	Springer Nature Link
Author	Kim, J. Y. Kang, J. S. Hwang, Jihoon Zhang, C. L. Lee, Eunsook Cheong, S. W. Park, B. G. Kim, D. H.
Copyright Year	2013
Abstract	The electronic structures of water-quenched (WQ) and checkerboard (CB) samples of spinel Co$_{0.6}$Fe$_{0.9}$Mn$_{1.5}$O$_{4}$ have been investigated by employing soft X-ray absorption spectroscopy and soft X-ray magnetic circular dichroism. The valence states of Co, Fe, and Mn ions are found to be nearly divalent (Co$^{2+}$), trivalent (Fe$^{3+}$), and Mn$^{2+}$-Mn$^{3+}$ mixed-valent, respectively, in both WQ and CB Co$_{0.6}$Fe$_{0.9}$Mn$_{1.5}$O$_{4}$. Mn$^{2+}$ and Mn$^{3+}$ ions occupy the tetrahedral (T $_{ d }$) and the octahedral (O $_{ h }$) sites, respectively, with their spin magnetic moments antiparallel to each other while Fe$^{3+}$ and Co$^{2+}$ ions occupy both O $_{ h }$ and T $_{ d }$ sites. As the CB nano-structures are formed in Co$_{0.6}$Fe$_{0.9}$Mn$_{1.5}$O$_{4}$, some of the T $_{ d }$-site Mn$^{2+}$ ions transform to O $_{ h }$-site Mn$^{3+}$ ions while some of the O $_{ h }$-site Fe$^{3+}$ ions transform to T $_{ d }$-site Fe$^{3+}$ ions. These findings indicate that the chemical phase separation in the CB nano-structures is mediated by the cooperative distortions of Janh-Teller Mn$^{3+}$ ions.
Starting Page	1990
Ending Page	1993
Page Count	4
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	62
Issue Number	12
e-ISSN	19768524
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-07-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Jahn-Teller Spinel Nano-structure pattern Theoretical, Mathematical and Computational Physics XAS Physics Particle and Nuclear Physics XMCD
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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