Ferroelectric-field-induced tuning of magnetism in the colossal magnetoresistive oxide La1-xSrxMnO3 -: art. no. 134415

被引：121

作者：

Hong, X ^{[1
]}

Posadas, A ^{[1
]}

Lin, A ^{[1
]}

Ahn, CH ^{[1
]}

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.68.134415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A ferroelectric field effect approach is presented for modulating magnetism in the colossal magnetoresistive oxide La1-xSrxMnO3 (LSMO). The ferromagnetic Curie temperature of ultrathin LSMO films was shifted by 35 K reversibly using the polarization field of the ferroelectric oxide Pb(ZrxTi1-x)O-3 in a field effect structure. This shift was also observed in magnetoresistance measurements, with the maximum magnetoresistance ratio at 6 T increasing from 64% to 77%. This model system approach does not introduce substitutional disorder or structural distortion, demonstrating that regulating the carrier concentration alone changes the magnetic phase transition temperature and leads to colossal effects.

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