Lattice, Electrical, and Magnetic Effects in Lanthanum Manganites La1-xSrxMnO3 (x = 0.125, 0.150, 0.175)

被引：2
作者：
Bulatov, A. R. [1 ]
Bogdanova, Kh. G. [1 ]
Golenishchev-Kutuzov, V. A. [2 ]
Elokhina, L. V. [3 ]
Neifel'd, E. A. [3 ]
Korolev, A. V. [3 ]
机构：
[1] Russian Acad Sci, Kazan Sci Ctr, Zavoisky Phys Tech Inst, Kazan 420029, Tatarstan, Russia
[2] Kazan State Power Engn Univ, Kazan 420066, Tatarstan, Russia
[3] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620219, Russia
来源：
PHYSICS OF THE SOLID STATE | 2010年 / 52卷 / 11期
基金：
俄罗斯基础研究基金会;
关键词：
Electrical Resistivity; Manganite; Structural Phase Transition; Teller Effect; Colossal Magnetoresistance;
D O I：
10.1134/S1063783410110272
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The temperature dependences of the velocities of transverse and longitudinal hypersound in lanthanum strontium manganites of the composition La1-x Sr (x) MnO3 (x = 0.125, 0.150, 0.175) have been measured at frequencies of 0.5-0.7 GHz. The structural phase transitions have been revealed, and their positions have been confirmed by data on the electrical resistance and magnetic measurements performed using the same samples. The results obtained have been analyzed in the framework of the model of competing Jahn-Teller distortions and magnetic ordering. The anomalies observed in the behavior of the velocities of longitudinal hypersound have been attributed to the local Jahn-Teller distortions, and their suppression due to the magnetic ordering has been considered a possible factor responsible for the colossal magnetoresistance.
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收藏
页码：2392 / 2398
页数：7
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