Possible Existence of Two Charge-Ordered Phases in Pr^sub 1-x^Ca^sub x^MnO^sub 3^ for 0.40 < = x < = 0.50

We report the Ca-concentration dependence of crystal structure, electrical transport and magnetic properties in the charge-ordered manganite ... for 0.40 ≤ x ≤ 0.50. We have observed an abrupt change in the thermoelectric power at x ~ 0.425, which implies that the charge-ordered phase discontinuousl...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2014-06, Vol.83 (6), p.1
Main Authors: Mondal, Partha Sarathi, Asai, Shinichiro, Igarashi, Taichi, Suzuki, Takahiro, kazaki, RyujiO, Terasaki, Ichiro, Yasui, Yukio, Kobayashi, Kensuke, Kumai, Reiji, Nakao, Hironori, Murakami, Youichi
Format: Article
Language:English
Subjects:
Crystal structure
Magnetism
Physics
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Summary:We report the Ca-concentration dependence of crystal structure, electrical transport and magnetic properties in the charge-ordered manganite ... for 0.40 ≤ x ≤ 0.50. We have observed an abrupt change in the thermoelectric power at x ~ 0.425, which implies that the charge-ordered phase discontinuously changes at this composition. We further find that the lattice distortion and ferromagnetic volume fraction also change at that particular concentration. These results indicate that the checker-board-type charge order near x = 0.50 is unstable below x = 0.425. A possible origin for this phenomenon is discussed. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0031-9015
1347-4073