Ferromagnetic insulating phase in Pr1-xCaxMnO3

R. Kajimoto; H. Mochizuki; H. Yoshizawa; S. Okamoto; S. Ishihara

doi:10.1103/PhysRevB.69.054433

Ferromagnetic insulating phase in Pr_1-xCa_xMnO₃

R. Kajimoto, H. Mochizuki, H. Yoshizawa, S. Okamoto, S. Ishihara

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31 Scopus citations

Abstract

A ferromagnetic insulating (FM-I) state in Pr_0.75Ca_0.25MnO₃has been studied by neutron scattering experiment and theoretical calculation. The insulating behavior is robust against an external magnetic field, and is ascribed to neither the phase separation between a ferromagnetic metallic (FM-M) phase and a nonferromagnetic insulating one, nor the charge ordering. We found that the Jahn-Teller type lattice distortion is much weaker than PrMnO₃ and the magnetic interaction is almost isotropic. These features resemble the ferromagnetic metallic state of manganites, but the spin exchange interaction J is much reduced compared to the FM-M state. The theoretical calculation based on the staggered type orbital order well reproduces several features of the spin and orbital state in the FM-I phase.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	69
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.69.054433
State	Published - Feb 27 2004
Externally published	Yes

Funding

This work was supported by a Grant-In-Aid for Scientific Research from MEXT, Japan.

Funders	Funder number
Ministry of Education, Culture, Sports, Science and Technology

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10.1103/PhysRevB.69.054433

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abstract = "A ferromagnetic insulating (FM-I) state in Pr0.75Ca0.25MnO3has been studied by neutron scattering experiment and theoretical calculation. The insulating behavior is robust against an external magnetic field, and is ascribed to neither the phase separation between a ferromagnetic metallic (FM-M) phase and a nonferromagnetic insulating one, nor the charge ordering. We found that the Jahn-Teller type lattice distortion is much weaker than PrMnO3 and the magnetic interaction is almost isotropic. These features resemble the ferromagnetic metallic state of manganites, but the spin exchange interaction J is much reduced compared to the FM-M state. The theoretical calculation based on the staggered type orbital order well reproduces several features of the spin and orbital state in the FM-I phase.",

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AU - Kajimoto, R.

AU - Mochizuki, H.

AU - Yoshizawa, H.

AU - Okamoto, S.

AU - Ishihara, S.

PY - 2004/2/27

Y1 - 2004/2/27

N2 - A ferromagnetic insulating (FM-I) state in Pr0.75Ca0.25MnO3has been studied by neutron scattering experiment and theoretical calculation. The insulating behavior is robust against an external magnetic field, and is ascribed to neither the phase separation between a ferromagnetic metallic (FM-M) phase and a nonferromagnetic insulating one, nor the charge ordering. We found that the Jahn-Teller type lattice distortion is much weaker than PrMnO3 and the magnetic interaction is almost isotropic. These features resemble the ferromagnetic metallic state of manganites, but the spin exchange interaction J is much reduced compared to the FM-M state. The theoretical calculation based on the staggered type orbital order well reproduces several features of the spin and orbital state in the FM-I phase.

AB - A ferromagnetic insulating (FM-I) state in Pr0.75Ca0.25MnO3has been studied by neutron scattering experiment and theoretical calculation. The insulating behavior is robust against an external magnetic field, and is ascribed to neither the phase separation between a ferromagnetic metallic (FM-M) phase and a nonferromagnetic insulating one, nor the charge ordering. We found that the Jahn-Teller type lattice distortion is much weaker than PrMnO3 and the magnetic interaction is almost isotropic. These features resemble the ferromagnetic metallic state of manganites, but the spin exchange interaction J is much reduced compared to the FM-M state. The theoretical calculation based on the staggered type orbital order well reproduces several features of the spin and orbital state in the FM-I phase.

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Ferromagnetic insulating phase in Pr_1-xCa_xMnO₃

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