Magnetoelectric properties of epitaxial Fe3O4 thin films on (011) PMN-PT piezosubstrates
authors Tkach, A; Yazdi, MB; Foerster, M; Buttner, F; Vafaee, M; Fries, M; Klaui, M
nationality International
journal PHYSICAL REVIEW B
keywords VERWEY TRANSITION; MAGNETORESISTANCE; MAGNETITE
abstract We determine the magnetic and magnetotransport properties of 33 nm thick Fe3O4 films epitaxially deposited by rf-magnetron sputtering on unpoled (011) [PbMg1/3Nb2/3O3](0.68) - [PbTiO3](0.32) (PMN-PT) substrates. The magnetoresistance (MR), as well as the magnetization reversal, strongly depend on the in-plane crystallographic direction of the epitaxial (011) Fe3O4 film and strain. When the magnetic field is applied along [100], the magnetization loops are slanted and the sign of the longitudinal MR changes from positive to negative around the Verwey transition at 125 K on cooling. Along the [01 (1) over bar] direction, the loops are square shaped and the MR is negative above the switching field across the whole temperature range, just increasing in absolute value when cooling from 300 K to 150 K. The value of the MR is found to be strongly affected by poling the PMN-PT substrate, decreasing in the [100] direction and slightly increasing in the [01 (1) over bar] direction upon poling, which results in a strained film.
publisher AMER PHYSICAL SOC
issn 1098-0121
year published 2015
volume 91
issue 2
digital object identifier (doi) 10.1103/PhysRevB.91.024405
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000348567500003
  ciceco authors
  impact metrics
times cited (wos core): 7
journal impact factor (jcr 2016): 3.836
5 year journal impact factor (jcr 2016): 3.711
category normalized journal impact factor percentile (jcr 2016): 73.881
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