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Peculiarities of the volume magnetostriction in La₁₋xSrxMnO₃ in the Curie point region
Репозиторій DSpace/Manakin
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Peculiarities of the volume magnetostriction in La₁₋xSrxMnO₃ in the Curie point region
Тема:
Специальный выпуск Низкотемпеpатуpная магнитостpикция магнетиков и свеpхпpоводников Под редакцией В. В. Еременко и В. А. Сиренко
Інший ID:
PACS: 75.80.+q, 75.30.Kz, 75.40.-s, 74.72.-h
Посилання:
Peculiarities of the volume magnetostriction in La₁₋xSrxMnO₃ in the Curie point region / L.I. Koroleva, A.I. Abramovich, R.V. Demin, A.V. Michurin // Физика низких температур. — 2001. — Т. 27, № 4. — С. 398-402. — Бібліогр.: 15 назв. — англ.
Підтримка:
This paper was supported by grants from INTAS,
#97-0253, NATO #HTECH LG 972942, and the
Russian Basic Investigations Foundation #00-15-
96695, #00-02-17810. We are grateful by A.M.
Balbashov for preparation of the samples and their
analysis.
Дата:
2001
Переглядів:
681
Завантажень:
389
Анотація:
The parallel λ∥ and perpendicular λ⊥ magnetostriction (with respect to the applied magnetic field) and the thermal expansion Δl/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 (ω=λ∥+2λ⊥) is negative and the |ω|(T) curves go through a maximum at the Curie point TC. At T>TC its Δl/l temperature dependence is stronger than linear. For the semiconducting sample with x=0.1, ω is negative at T<TC and |ω|→0 at T∼TC. Its Δl/l is linear at T<=TC. The behavior of ω and Δl/l are explained by a magnetic two-phase state, due to strong s−d exchange.
