Magnetic Properties and Magnetic Entropy Change in Gd/Ti Multilayers

Author

Svalov, A.V. ; Vas´kovskiy, V.V. ; Balymov, K.G. ; Alonso, J. ; Fdez-Gubieda, M.L. ; Kurlyandskaya, G.V.

Author_Institution

Dept. de Electr. y Electron., Univ. del Pais Vasco, Bilbao, Spain

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

[Gd/Ti]_n multilayers with different thicknesses of Gd layers (L_Gd) have been prepared by magnetron sputtering. These multilayers exhibit second-order phase transitions at different temperatures, which are determined by L_Gd. The peak value of magnetic entropy change in Gd(300 nm) film is nearly two times smaller than the one of bulk Gd. The decrease of the L_Gd in the thin film samples leads to a reduction of the maximum value of the magnetic entropy change. Simultaneously, the corresponding full-width at half-maximum increases with L_Gd decrease. The practical utility of the magnetic layer thickness as control parameter to tune the magnetocaloric properties of materials has been demonstrated.

Keywords

entropy; gadolinium; magnetic multilayers; magnetic thin films; magnetocaloric effects; metallic thin films; nanofabrication; nanomagnetics; nanostructured materials; solid-state phase transformations; sputter deposition; titanium; Gd layer thicknesses; [Gd-Ti]_n; full-width-at-half-maximum; magnetic entropy change; magnetic layer thickness; magnetic properties; magnetocaloric properties; magnetron sputtering; multilayers; second-order phase transitions; size 300 nm; thin film; Entropy; Magnetic multilayers; Magnetization; Nonhomogeneous media; Temperature distribution; Temperature measurement; Magnetic entropy change; magnetic multilayers; nanocrystalline structure; rare earth metals;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2326915

Filename

6971445