Magnetocaloric effect and improved relative cooling power in (La 0.7Sr0.3MnO3/SrRuO3) superlattices

Q. Zhang, S. Thota, F. Guillou, P. Padhan, V. Hardy, A. Wahl, W. Prellier

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Magnetic properties of a series of (La0.7Sr 0.3MnO3/SrRuO3) superlattices, where the SrRuO3 layer thickness is varying, are examined. A room-temperature magnetocaloric effect is obtained owing to the finite size effect which reduces the TC of La0.7Sr0.3MnO3 layers. While the working temperature ranges are enlarged, -ΔSM max values remain similar to the values in polycrystalline La 0.7Sr0.3MnO3. Consequently, the relative cooling powers are significantly improved, the microscopic mechanism of which is related to the effect of the interfaces at La0.7Sr 0.3MnO3/SrRuO3 and higher nanostructural disorder. This study indicates that artificial oxide superlattices/multilayers might provide an alternative pathway in searching for efficient room-temperature magnetic refrigerators for (nano) micro-scale systems.

Original languageEnglish
Article number052201
JournalJournal of Physics Condensed Matter
Volume23
Issue number5
DOIs
StatePublished - Feb 9 2011
Externally publishedYes

Funding

FundersFunder number
Seventh Framework Programme214040

    Fingerprint

    Dive into the research topics of 'Magnetocaloric effect and improved relative cooling power in (La 0.7Sr0.3MnO3/SrRuO3) superlattices'. Together they form a unique fingerprint.

    Cite this