Giant phonon softening in ferromagnetic LaMnO3+δ

被引：0

作者：

Pashkevich, YG ^{[1
]}

Gnezdilov, VP ^{[1
]}

Lemmens, P ^{[1
]}

Choi, KY ^{[1
]}

Güntherodt, G ^{[1
]}

Yeremenko, AV ^{[1
]}

Barilo, SN ^{[1
]}

Shiryaev, SV ^{[1
]}

Soldatov, AG ^{[1
]}

机构：

[1] AA Galkin Donetsk Phystech NASU, UA-83114 Donetsk, Ukraine

来源：

SPECTROSCOPY OF EMERGING MATERIALS | 2004年 / 165卷

关键词：

manganites; Raman light scattering; orbital degrees of freedom;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High quality single crystals of LaMnO3+delta with delta = 0.071, 0.085, 0.092, 0.097, 0.125 that extend from antiferromagnetic insulating (delta = 0.071, T-N = 128 K) to ferromagnetic metallic state (delta = 0.125, T-C = 248 K) have been investigated by polarized Raman light scattering. A giant softening up to 30 cm(-1) of the 490- and 620-cm(-1) phonon modes has been observed below the Curie temperature. We interpret this phenomenon as a manifestation of an orbital fluctuating state which exists in a wide temperature range in ferromagnetic LaMnO3+delta.

引用

页码：185 / 194

页数：10

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