Phase transitions, diffuse scattering and segregation kinetics in the colossal magnetoresistance material Pr70Ca30MnO3

S. Katano; J. A. Fernandez-Baca; Y. Yamada

doi:10.1016/S0921-4526(99)01644-0

Phase transitions, diffuse scattering and segregation kinetics in the colossal magnetoresistance material Pr₇₀Ca₃₀MnO₃

S. Katano, J. A. Fernandez-Baca, Y. Yamada

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Abstract

The successive phase transitions to the charge-ordered (CO), antiferromagnetic (AFM) and ferromagnetic (FM) states in Pr₇₀Ca₃₀MnO₃, as well as the enhancement of the FM state by the application of a magnetic field, have been studied using neutron diffraction. FM diffuse scattering that persists down to low temperatures indicates the existence of FM clusters. The relaxation process from a metastable FM to a CO and AFM state reveals percolative nature of the dramatic metal-to-insulator transition of this system. These results show that the system is phase-separated.

Original language	English
Pages (from-to)	786-787
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	276-278
DOIs	https://doi.org/10.1016/S0921-4526(99)01644-0
State	Published - Mar 2000
Event	2nd European Conference on Neutron Scattering (ECNS '99) - Budapest, Hung Duration: Sep 1 1999 → Sep 4 1999

Funding

The authors thank Prof. Y. Moritomo for providing the excellent single crystal. This work was supported by JAERI and ORNL under JAERI-DOE cooperative program on neutron scattering. The ORNL is managed by Lockheed Martin Energy Research Corp. for the DOE under contract number DE-AC05-96OR22464.

Funders	Funder number
Lockheed Martin Energy Research Corp.
U.S. Department of Energy	DE-AC05-96OR22464
Oak Ridge National Laboratory
Japan Atomic Energy Research Institute

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abstract = "The successive phase transitions to the charge-ordered (CO), antiferromagnetic (AFM) and ferromagnetic (FM) states in Pr70Ca30MnO3, as well as the enhancement of the FM state by the application of a magnetic field, have been studied using neutron diffraction. FM diffuse scattering that persists down to low temperatures indicates the existence of FM clusters. The relaxation process from a metastable FM to a CO and AFM state reveals percolative nature of the dramatic metal-to-insulator transition of this system. These results show that the system is phase-separated.",

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N2 - The successive phase transitions to the charge-ordered (CO), antiferromagnetic (AFM) and ferromagnetic (FM) states in Pr70Ca30MnO3, as well as the enhancement of the FM state by the application of a magnetic field, have been studied using neutron diffraction. FM diffuse scattering that persists down to low temperatures indicates the existence of FM clusters. The relaxation process from a metastable FM to a CO and AFM state reveals percolative nature of the dramatic metal-to-insulator transition of this system. These results show that the system is phase-separated.

AB - The successive phase transitions to the charge-ordered (CO), antiferromagnetic (AFM) and ferromagnetic (FM) states in Pr70Ca30MnO3, as well as the enhancement of the FM state by the application of a magnetic field, have been studied using neutron diffraction. FM diffuse scattering that persists down to low temperatures indicates the existence of FM clusters. The relaxation process from a metastable FM to a CO and AFM state reveals percolative nature of the dramatic metal-to-insulator transition of this system. These results show that the system is phase-separated.

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JF - Physica B: Physics of Condensed Matter

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Y2 - 1 September 1999 through 4 September 1999

ER -

Phase transitions, diffuse scattering and segregation kinetics in the colossal magnetoresistance material Pr₇₀Ca₃₀MnO₃

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