Distinct insulating state below the Curie point in Pr0.7Ba0.3MnO3

A. K. Heilman; Y. Y. Xue; B. Lorenz; B. J. Campbell; J. Cmaidalka; R. L. Meng; Y. S. Wang; C. W. Chu

doi:10.1103/PhysRevB.65.214423

Distinct insulating state below the Curie point in Pr_0.7Ba_0.3MnO₃

A. K. Heilman, Y. Y. Xue, B. Lorenz, B. J. Campbell, J. Cmaidalka, R. L. Meng, Y. S. Wang, C. W. Chu

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34 引文斯高帕斯（Scopus）

摘要

Magnetization, resistivity, thermal expansion, thermopower, and neutron powder diffraction data are presented for the perovskite manganite Pr_0.7Ba_0.3MnO₃. A distinct ferromagnetic insulating state, similar to that observed in the La_0.88Sr_0.12MnO₃ system, is observed in the temperature range between the paramagnetic-ferromagnetic transition at T_FM ≈ 180 K and the broad metal-insulator transition near T_p = 120 K. The large A-site cation-size mismatch appears to suppress the ferromagnetic double-exchange interactions relative to the competing ferromagnetic superexchange interactions, thereby giving rise to the ferromagnetic insulating state.

原文	English
文章編號	214423
頁（從 - 到）	2144231-2144235
頁數	5
期刊	Physical Review B - Condensed Matter and Materials Physics
卷	65
發行號	21
DOIs	https://doi.org/10.1103/PhysRevB.65.214423
出版狀態	Published - 2002 6月 1

All Science Journal Classification (ASJC) codes

電子、光磁材料
凝聚態物理學

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10.1103/PhysRevB.65.214423

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title = "Distinct insulating state below the Curie point in Pr0.7Ba0.3MnO3",

abstract = "Magnetization, resistivity, thermal expansion, thermopower, and neutron powder diffraction data are presented for the perovskite manganite Pr0.7Ba0.3MnO3. A distinct ferromagnetic insulating state, similar to that observed in the La0.88Sr0.12MnO3 system, is observed in the temperature range between the paramagnetic-ferromagnetic transition at TFM ≈ 180 K and the broad metal-insulator transition near Tp = 120 K. The large A-site cation-size mismatch appears to suppress the ferromagnetic double-exchange interactions relative to the competing ferromagnetic superexchange interactions, thereby giving rise to the ferromagnetic insulating state.",

author = "Heilman, {A. K.} and Xue, {Y. Y.} and B. Lorenz and Campbell, {B. J.} and J. Cmaidalka and Meng, {R. L.} and Wang, {Y. S.} and Chu, {C. W.}",

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T1 - Distinct insulating state below the Curie point in Pr0.7Ba0.3MnO3

AU - Heilman, A. K.

AU - Xue, Y. Y.

AU - Lorenz, B.

AU - Campbell, B. J.

AU - Cmaidalka, J.

AU - Meng, R. L.

AU - Wang, Y. S.

AU - Chu, C. W.

PY - 2002/6/1

Y1 - 2002/6/1

N2 - Magnetization, resistivity, thermal expansion, thermopower, and neutron powder diffraction data are presented for the perovskite manganite Pr0.7Ba0.3MnO3. A distinct ferromagnetic insulating state, similar to that observed in the La0.88Sr0.12MnO3 system, is observed in the temperature range between the paramagnetic-ferromagnetic transition at TFM ≈ 180 K and the broad metal-insulator transition near Tp = 120 K. The large A-site cation-size mismatch appears to suppress the ferromagnetic double-exchange interactions relative to the competing ferromagnetic superexchange interactions, thereby giving rise to the ferromagnetic insulating state.

AB - Magnetization, resistivity, thermal expansion, thermopower, and neutron powder diffraction data are presented for the perovskite manganite Pr0.7Ba0.3MnO3. A distinct ferromagnetic insulating state, similar to that observed in the La0.88Sr0.12MnO3 system, is observed in the temperature range between the paramagnetic-ferromagnetic transition at TFM ≈ 180 K and the broad metal-insulator transition near Tp = 120 K. The large A-site cation-size mismatch appears to suppress the ferromagnetic double-exchange interactions relative to the competing ferromagnetic superexchange interactions, thereby giving rise to the ferromagnetic insulating state.

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Distinct insulating state below the Curie point in Pr0.7Ba0.3MnO3

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Distinct insulating state below the Curie point in Pr_0.7Ba_0.3MnO₃