Acoustic and acoustoelectric studies of manganite films

作者：Ilisavskii Y; Goltsev A; Dyakonov K^*; Popov V; Yakhkind E; Dyakonov VP; Gierlowski P; Klimov A; Lewandowski SJ; Szymczak H

来源：Journal of Magnetism and Magnetic Materials, 2002, 242: 707-709.

DOI：10.1016/S0304-8853(01)00996-9

• magnetoresistance-thin films
• ultrasonic attenuation
• acoustoelectric effect

We report on acoustic and acoustoelectric (AE) studies of La0.67Ca0.33MnO3 (LCMO) films deposited on a LiNbO3 substrate. Surface acoustic wave (SAW) attenuation in the LCMO films has been measured at different sound frequencies in the wide temperature range. Our measurements confirm the hole-like conductivity in La0.67Ca0.33MnO3 films and reveal an anomalous (even in the SAW wave vector) contribution to the AE effect, which coexists with the ordinary (odd) effect. The anomalous AE effect is shown to be due to a strong modulation of the film conductivity produced by elastic deformations carried by the SAW.

• 出版日期2002-4