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Giant and reversible extrinsic magnetocaloric effects in La0.7Ca0.3MnO3 films due to strain

DOI: 10.1038/NMAT3463 DOI Help

Authors: X. Moya (University of Cambridge) , L. E. Hueso (CIC nanoGUNE Consolider) , F. Maccherozzi (Diamond Light Source) , A. I. Tovstolytkin (Institute of Magnetism) , D. I. Podyalovskii (Institute of Magnetism) , C. Ducati (University of Cambridge) , L. Phillips (University of Cambridge) , M. Ghidini (University of Cambridge) , O. Hovorka (CIC nanoGUNE Consolider) , A. Berger (CIC nanoGUNE Consolider) , M. Vickers (University of Cambridge) , E. Defay (University of Cambridge) , S. S. Dhesi (Diamond Light Source) , N. D. Mathur (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Materials , VOL 12 (1)

State: Published (Approved)
Published: October 2012

Abstract: Large thermal changes driven by a magnetic field have been proposed for environmentally friendly energy-efficient refrigeration, but only a few materials that suffer hysteresis show these giant magnetocaloric effects. Here we create giant and reversible extrinsic magnetocaloric effects in epitaxial films of the ferromagnetic manganite La0.7Ca0.3MnO3 using strain-mediated feedback from BaTiO3 substrates near a first-order structural phase transition. Our findings should inspire the discovery of giant magnetocaloric effects in a wide range of magnetic materials, and the parallel development of nanostructured bulk samples for practical applications.

Diamond Keywords: Ferromagnetism

Subject Areas: Physics, Materials

Instruments: I06-Nanoscience (XPEEM)

Added On: 28/01/2013 09:17

Discipline Tags:

Quantum Materials Physics Magnetism Materials Science Nanoscience/Nanotechnology

Technical Tags:

Microscopy Spectroscopy Electron Microscopy (EM) PhotoEmmission Electron Microscopy (PEEM) Circular Dichroism (CD) X-ray Magnetic Circular Dichroism (XMCD)