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Strong-Gravity Experiments on Perovskite-Type Oxides

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Abstract:

Strong gravitational field causes the displacement or/and sedimentation of atoms in solids, by which we can changes the crystalline state or/and composition in multicomponent condensed matter. Perovskite-type doped manganite, La1-xSrxMnO3 (LSMO) has unique magnetoresistance effect which is called “colossal magnetoresistance (CMR)”. In this study, the strong gravity experiment (0.40x106G, 400°C, 20h) was performed on the LSMO oriented crystal to examine the change in composition or structure. The LSMO crystal whose growing crystal direction is normal to (214) plane was prepared by the floating zone method. The EPMA and XRD results of the gravity sample revealed that the La compositions decrease in the crystal grain, while the structure did not change much. The SQUID analysis showed that the magnetic property of the gravity sample had changed.

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Periodical:

Advances in Science and Technology (Volume 88)

Pages:

70-73

DOI:

https://doi.org/10.4028/www.scientific.net/AST.88.70

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Online since:

October 2014

Authors:

Makoto Tokuda*, Khandaker Jahirul Isram, Yudai Ogata, Yoji Mine, Tadao Nishiyama, Shinya Hayami, Akira Yoshiasa, Tsutomu Mashimo

Keywords:

Manganese Oxide, Perovskite-Type Oxides, Strong Gravity

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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