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Singlet Ground State and Magnetization Plateaus in Ba$_3$Mn$_2$O$_8$ | M. Uchida
; H. Tanaka
; M. Bartashevich
; T. Goto
; | Date: |
2 Feb 2001 | Subject: | Strongly Correlated Electrons | cond-mat.str-el | Abstract: | Magnetic susceptibility and the magnetization process have been measured in green polycrystal. In this compound, the magnetic manganese ion exists as Mn$^{5+}$ in a tetrahedral environment, and thus the magnetic interaction can be described by an S=1 Heisenberg model. The ground state was found to be a spin singlet with an excitation gap $Delta/k_{
m B}=11.2$ K. Magnetization plateaus were observed at zero and at half of the saturation magnetization. These results indicate that the present system can be represented by a coupled antiferromagnetic dimer model. | Source: | arXiv, cond-mat/0102026 | Services: | Forum | Review | PDF | Favorites |
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