Enhanced specific heat jump in electron-doped CaMnO3: Spin ordering driven by charge separation

Y. Moritomo; A. Machida; E. Nishibori; M. Takata; M. Sakata

Enhanced specific heat jump in electron-doped CaMnO₃: Spin ordering driven by charge separation

Y. Moritomo, A. Machida, E. Nishibori, M. Takata, M. Sakata

Research output: Contribution to journal › Article › peer-review

Abstract

Temperature variation of the magnetic susceptibility χ, resistivity ρ, specific heat C, and lattice constants has been investigated in electron-doped CaMnO₃. The parent CaMnO₃ is an antiferromagnetic band insulator, and shows an insulator-metal crossover with electron doping, together with an enhanced ferromagnetic component. We have found an enhancement of the specific heat jump AC at the spin-ordering temperature T_spin and interpreted the enhancement in terms of the intrinsic charge separation.

Original language	English
Article number	214409
Pages (from-to)	2144091-2144095
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	21
Publication status	Published - 2001 Dec 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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abstract = "Temperature variation of the magnetic susceptibility χ, resistivity ρ, specific heat C, and lattice constants has been investigated in electron-doped CaMnO3. The parent CaMnO3 is an antiferromagnetic band insulator, and shows an insulator-metal crossover with electron doping, together with an enhanced ferromagnetic component. We have found an enhancement of the specific heat jump AC at the spin-ordering temperature Tspin and interpreted the enhancement in terms of the intrinsic charge separation.",

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AU - Moritomo, Y.

AU - Machida, A.

AU - Nishibori, E.

AU - Takata, M.

AU - Sakata, M.

PY - 2001/12/1

Y1 - 2001/12/1

N2 - Temperature variation of the magnetic susceptibility χ, resistivity ρ, specific heat C, and lattice constants has been investigated in electron-doped CaMnO3. The parent CaMnO3 is an antiferromagnetic band insulator, and shows an insulator-metal crossover with electron doping, together with an enhanced ferromagnetic component. We have found an enhancement of the specific heat jump AC at the spin-ordering temperature Tspin and interpreted the enhancement in terms of the intrinsic charge separation.

AB - Temperature variation of the magnetic susceptibility χ, resistivity ρ, specific heat C, and lattice constants has been investigated in electron-doped CaMnO3. The parent CaMnO3 is an antiferromagnetic band insulator, and shows an insulator-metal crossover with electron doping, together with an enhanced ferromagnetic component. We have found an enhancement of the specific heat jump AC at the spin-ordering temperature Tspin and interpreted the enhancement in terms of the intrinsic charge separation.

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Enhanced specific heat jump in electron-doped CaMnO3: Spin ordering driven by charge separation

Abstract

ASJC Scopus subject areas

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Enhanced specific heat jump in electron-doped CaMnO₃: Spin ordering driven by charge separation