Peculiarities of the volume magnetostriction in La1-xSrxMnO3 in the Curie point region
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PACS: 75.80. q, 75.30.Kz, 75.40.-s, 74.72.-hАнотація
The parallel l|| and perpendicular l^ magnetostriction with respect to the applied magnetic field and the thermal expansion Dl/l are studied on La1-xSrxMnO3 single crystals with x=0.1, 0.15, and 0.3. For the conducting sample with x=0.3 and the semiconducting sample with x=0.15 the volume magnetostriction (w=l||+2l^) is negative and the |w|(T) curves go through a maximum at the Curie point TC. At T > TC its Dl/l temperature dependence is stronger than the linear one. For the semiconducting sample with x=0.1 w is negative at T < TC and |w|╝0 at T~TC. Its Dl/l is linear at T ≥ TC. The behavior of w and Dl/l are explained by a magnetic two-phase state, due to strong s-d exchange.
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Опубліковано
2001-04-10
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L. I. Koroleva, A. I. Abramovich, R. V. Demin, and A. V. Michurin, Peculiarities of the volume magnetostriction in La1-xSrxMnO3 in the Curie point region, Low Temp. Phys. 27, (2001) [Fiz. Nizk. Temp. 27, 398-402, (2001)].
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