IEEE Magnetics Letters

Voltage-Tuned Transport Properties and Ferromagnetic Resonance in Lanthanum Strontium Manganite/Lead Magnesium Niobate-Lead Titanate Multiferroic Heterostructures

Author Mingmin Zhu

M. Zhu, Z. Hu, C. Li, X. Xue, G. Yang, W. Ren, Z.-G. Ye, Z. Zhou, M. Liu, “Voltage-Tuned Transport Properties and Ferromagnetic Resonance in Lanthanum Strontium Manganite/Lead Magnesium Niobate-Lead Titanate Multiferroic Heterostructures”, IEEE Magnetics Letters , 9, 2501105 (2018)

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Abstract

We demonstrate piezostrain-induced modulation of transport and ferromagnetic resonance (FMR) properties in the La 0.5Sr0.5MnO3 (LSMO5)/0.7Pb(Mg1/3Nb2/3)O3 -0.3PbTiO3 (PMN-PT) (0 0 1) multiferroic heterostructures. The poling strain leads to the enhancement of the double exchange interaction and the reduction of Jahn-Teller electron-lattice distortion in the LSMO5 film, showing a maximum resistance decrease of 27% at 105 K, around which temperature the maximum magnetoresistance change of 10% is tuned by the piezostrain. The FMR response to the strain changes is probed by temperature-dependent electron spin resonance spectra, showing the largest FMR field shift of 220 Oe at the Néel temperature of 193 K. The magnetoelectric coupling behavior at the antiferromagnetic phase of LSMO5 film was dominated by the two-magnon scattering effect, which provides a new route for voltage-controllable magnetism in future spintronic devices.