In situ dynamical control of the strain and magnetoresistance of La 0.7Ca0.15Sr0.15MnO3 thin films using the magnetostriction of Terfenol-D alloy

R. K. Zheng, S. H. Choy, Y. Wang, H. L.W. Chan, C. L. Choy, H. S. Luo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

We fabricated a magnetoelectric laminate structure consisting of a magnetostrictive Tb0.3Dy0.7Fe1.92 (Terfenol-D) plate bonded to a La0.7Ca0.15Sr0.15MnO 3 (LCSMO)/0.67Pb(Mg1/3Nb2/3)O 3-0.33PbTiO3 (PMN-PT) structure where a LCSMO film was epitaxially grown on a PMN-PT single crystal substrate. When a dc magnetic field is applied perpendicular to the film plane, the magnetoresistance of the LCSMO film in the paramagnetic (ferromagnetic) state for the LCSMO/PMN-PT/Terfenol-D structure is larger (smaller) than that for the LCSMO/PMN-PT structure without Terfenol-D. These effects are caused by the magnetostriction-induced in-plane compressive strain in the Terfenol-D, which are transferred to the PMN-PT substrate, leading to a reduction in the in-plane tensile strain of the epitaxial LCSMO film and thereby modifying the magnetoresistance of the film.

Original languageEnglish
Pages (from-to)4878-4881
Number of pages4
JournalJournal of Alloys and Compounds
Volume509
Issue number14
DOIs
Publication statusPublished - 7 Apr 2011

Keywords

  • Magnetoelectric effect
  • Magnetoresistance
  • PMN-PT single crystal
  • Terfenol-D magnetostrictive alloy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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