RT Journal Article
T1 The role of surface to bulk ratio on the development of magnetic anisotropy in high Ga content Fe100-xGax thin films
A1 Muñoz Noval, A.
A1 Fin, S.
A1 Salas Colera, Eduardo
A1 Bisero, Diego
A1 Ranchal, Rocío
AB In this work we show the development of bulk in-plane magnetic anisotropy in high Ga-content (Ga = 28 at. %) Fe100-xGax thin films as the layer thickness increases. This result is in clear contrast with the generally reported decrease of this anisotropy with the film thickness. We propose the interrelation between the enhancement of the Ga-pair correlations and a collinear distortion of the bcc structure within the sample plane as the origin of the magnetic anisotropy. Our results have been obtained by employing a combination of long and local range structural probe techniques with bulk and surface magnetic characterization techniques. The key point shown in this work is that the in-plane structural anisotropy and hence, the magnetic anisotropy, are developed as the layer thickness increases. This fact strongly suggests that the surface to bulk free energy ratio plays a key role in the formation of ordered phases with a distorted bcc cell in Fe100-xGax films with x around 28 at. %. Our work also shows the arising of new phenomena in these high Ga content alloys due to the close correlation between structural and magnetic properties.
PB ELSEVIER BV
SN 0925-8388
YR 2018
FD 2018-05-15
LK https://hdl.handle.net/10016/35724
UL https://hdl.handle.net/10016/35724
LA eng
NO We thank ‘CAI Difraccion de rayos-X  ’ of UCM for x-ray diffractometry measurements and ‘Instituto of Sistemas Optoelectronicosy Microtecnología’ (ISOM) for using its facilities. We also want tothank BM25-Spline, the Spanish CRG at ESRF in Grenoble (France)for providing beamtime. This work has been financially supportedthrough the project MAT2015-66888-C3-3-R of the Spanish Ministry of Economy and Competitiveness (MINECO/FEDER) and project PR26/16-3B-2 of Santander and Universidad Complutense deMadrid.
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RD 27 jul. 2024