Longitudinal sound velocity and internal friction in ferromagnetic La1-xSrxMnO3 single-crystal manganites / Zainullina RI,Bebenin NG,Burkhanov AM,Ustinov VV,Mukovskii YM // PHYSICAL REVIEW B. - 2002. - V. 66, l. 6.

ISSN/EISSN:

1098-0121 / нет данных

Type:

Article

Abstract:

We have studied the temperature dependence of sound velocity and internal friction in ferromagnetic La1-xSrxMnO3 single crystals, x=0.15, 0.20, and 0.25, grown by the floating zone method. The sound velocity and internal friction were determined by the composite oscillator method at frequencies of order 100 kHz. The compositional metal-insulator transition has been found to be accompanied by an increase of the sound velocity and a weakening of its temperature dependence. It is likely that La0.85Sr0.15MnO3 undergoes a transition between the O{*} phase and an unknown phase at about 60 K. In La0.80Sr0.20MnO3, a weak transition of the first order occurs at 400 K. It has been revealed that the giant thermal hysteresis of sound velocity and internal friction is the specific feature of the Pnma-R (3) over barc transition; therefore, in a wide temperature range there is the mixture of these crystalline phases. Above 400 K, relaxation peaks of the internal friction due to point defects have been found.

Author keywords:

PHASE-TRANSITIONS; LA0.85SR0.15MNO3

DOI:

10.1103/PhysRevB.66.064421

Web of Science ID:

ISI:000177911700076

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG 1
Publisher	AMERICAN PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	064421
Keywords-Plus	PHASE-TRANSITIONS; LA0.85SR0.15MNO3
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Ustinov, Vladimir/G-7501-2011 Zainullina, Rimma/J-4287-2013 Bebenin, Nikolay/K-6955-2013
ORCID-Numbers	Ustinov, Vladimir/0000-0002-5155-7947 Zainullina, Rimma/0000-0002-0353-4775 Bebenin, Nikolay/0000-0003-2035-6103
Number-of-Cited-References	23
Usage-Count-Since-2013	2
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	591ZM