Structural study on the phase separation in Sm1-xCa xMnO3 (0.8x0.92)

Bongju Kim, P. Tong, Daeyoung Kwon, Youngsoo Wu, Jai Seok Ahn, Il Kyoung Jeong, Sung Baek Kim, S. W. Cheong, Bog G. Kim

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Abstract

We have investigated the details of phase separation in the electron-doped manganites Sm1-xCaxMnO3 (0.8x0.92) by using temperature dependent x-ray diffraction. The lattice of the lowerature orthorhombic phase is distorted to various extents according to the strength of the coexisting monoclinic phase. Meanwhile, the roomerature lattice becomes more distorted due to the increasing Jahn-Teller active Mn3+ ions by Sm3+ doping. On the other hand, the substitution of Ca2+ with Sm3+ introduces the Mn3+ - Mn4+ pairs, which favor the double exchange ferromagnetism. As a result of the competition between the lattice distortion and electron doping level, the modified phase diagram have been presented, including the higherature Griffiths phase and the ground state with competing multiphases.

Original languageEnglish (US)
Article number093927
JournalJournal of Applied Physics
Volume105
Issue number9
DOIs
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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