Details

Autor(en) / Beteiligte

• Moya, X.
• Hueso, L. E.
• Maccherozzi, F.
• Tovstolytkin, A. I.
• Podyalovskii, D. I.
• Ducati, C.
• Phillips, L. C.
• Ghidini, M.
• Hovorka, O.
• Berger, A.
• Vickers, M. E.
• Defay, E.
• Dhesi, S. S.
• Mathur, N. D.

Titel

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

Ist Teil von

• Nature materials, 2013-01, Vol.12 (1), p.52-58

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 La 0.7 Ca 0.3 MnO 3 using strain-mediated feedback from BaTiO 3 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. The thermodynamic properties of magnetocaloric materials show significant promise for energy-efficient cooling applications. The demonstration that large and reversible magnetocaloric effects can be created by means of strain suggests a new approach for inducing them in other magnetic materials.