Inducing Ferrimagnetism in Insulating Hollandite Ba1.2Mn8O16
作者： Amber M. Larson , Pouya Moetakef , Karen Gaskell , Craig M. Brown , Graham King
DOI: 10.1021/CM503801J
关键词:
摘要: Magnetic insulators are functional materials with potential applications in spintronics and multiferroics. The hollandites AxM8O16, which contain mixed-valent transition metals, have demonstrated ferromagnetism combined insulating behavior provide a new platform for exploring the effects of magnetic frustration due to their “folded” triangular lattice. We tuned hollandite BaxMn8O16 from complex antiferromagnet Neel temperature (TN) = 25 K ferrimagnet Curie (TC) 180 via partial cobalt substitution manganese. Both BaxCoyMn8-yO16 were prepared by salt flux methods, neutron X-ray diffraction confirm distorted hollandite-type structure both oxides. photoelectron spectroscopy reveals that Co2+ drives average Mn oxidation state 3.7+ nearly 4.0+, thereby changing its d-electron count. Magnetization resistivity measurements show cobalt-doped is ferrimagnetic insul...
acs.org
sci-hub.se 参考文章(82)
Maria C. Militello, Stephen W. Gaarenstroom, Lithium Manganese Oxide (LiMn2O4) by XPS Surface Science Spectra. ,vol. 8, pp. 207- 213 ,(2001) , 10.1116/11.20020402
Jennifer E Drewes, Ram Seshadri, Arthur P Ramirez, Brent C Melot, E M Stoudenmire, Magnetic phase evolution in the spinel compounds Zn1−xCoxCr2O4 Journal of Physics: Condensed Matter. ,vol. 21, pp. 216007- ,(2009) , 10.1088/0953-8984/21/21/216007
A. C. Komarek, M. Isobe, J. Hemberger, D. Meier, T. Lorenz, D. Trots, A. Cervellino, M. T. Fernández-Díaz, Y. Ueda, M. Braden, Dimerization and Charge Order in Hollandite K(2)V(8)O(16) Physical Review Letters. ,vol. 107, pp. 027201- ,(2011) , 10.1103/PHYSREVLETT.107.027201
S Ishiwata, J W G Bos, Q Huang, R J Cava, Structure and magnetic properties of hollandite Ba1.2Mn8O16 Journal of Physics: Condensed Matter. ,vol. 18, pp. 3745- 3752 ,(2006) , 10.1088/0953-8984/18/15/019
Priya Mahadevan, Abhinav Kumar, Debraj Choudhury, D. D. Sarma, Charge ordering induced ferromagnetic insulator: K2Cr8O16. Physical Review Letters. ,vol. 104, pp. 256401- ,(2010) , 10.1103/PHYSREVLETT.104.256401
Jun Sugiyama, Hiroshi Nozaki, Martin Månsson, Krunoslav Prša, Daniel Andreica, Alex Amato, Masahiko Isobe, Yutaka Ueda, μ + SR study on ferromagnetic hollandite K 2 Cr 8 O 16 and Rb 2 Cr 8 O 16 Physical Review B. ,vol. 85, pp. 214407- ,(2012) , 10.1103/PHYSREVB.85.214407
S. TURNER, P. R. BUSECK, Manganese oxide tunnel structures and their intergrowths. Science. ,vol. 203, pp. 456- 458 ,(1979) , 10.1126/SCIENCE.203.4379.456
Masaoki Oku, Yoshito Sato, In-situ X-ray photoelectron spectroscopic study of the reversible phase transition between CoO and Co3O4 in oxygen of 10−3 Pa Applied Surface Science. ,vol. 55, pp. 37- 41 ,(1992) , 10.1016/0169-4332(92)90378-B
R. W. Cheary, A. Coelho, A fundamental parameters approach to X-ray line-profile fitting Journal of Applied Crystallography. ,vol. 25, pp. 109- 121 ,(1992) , 10.1107/S0021889891010804
Bas B. Van Aken, Thomas T.M. Palstra, Alessio Filippetti, Nicola A. Spaldin, The origin of ferroelectricity in magnetoelectric YMnO3. Nature Materials. ,vol. 3, pp. 164- 170 ,(2004) , 10.1038/NMAT1080