150
R. Mattana et al.
Fig. 5.12 a Hall resistance for a Pt/Co/GdOx sample as deposited (red) and after an applied bias
voltage leading to an electric field of −625 kV cm −1 (blue) and +625 kV cm −1 (purple) showing an
in-plane to out-of-plane magnetization transition. b XAS and XMCD spectra recorded at the Co L 3
edge. A negative voltage induces an oxidation of the Co layer, whereas a positive voltage reduces
the Co layer. c Magnetic hysteresis loop of a V/Fe/MgO sample obtained for two bias voltages
showing a modification of the coercive field. d Fe L 2,3 XAS and XMCD spectra recorded at +4 V
and −4 V. Fe oxidation/reduction is not observed demonstrating that the coercive field modification
is rather attributed to a charge effect. a, b Adapted from [39] with permission (Copyright 2014,
American Physical Society) and c, d from [41] with permission (Copyright 2015, American Institute
of Physics Publishing)
presented showing different strain domains for the CoFe 2 O 4 layer induced by the
BaTiO 3 substrate. By recording XMCD-PEEM images at the Fe L 3 edge, domains
with different magnetic signals are observed. In Fig. 5.13, it appears clearly that a
correlation exists between the strain state and the magnetic signal. Black domains
in the XLD-PEEM [see Fig. 5.13d] correspond to a magnetization along the [100]
direction [see Fig. 5.13a], whereas for white domains, the magnetization is along
the [010] direction [see Fig. 5.13c]. Hence, by performing XLD-PEEM and XMCD-
R. Mattana et al.
Fig. 5.12 a Hall resistance for a Pt/Co/GdOx sample as deposited (red) and after an applied bias
voltage leading to an electric field of −625 kV cm −1 (blue) and +625 kV cm −1 (purple) showing an
in-plane to out-of-plane magnetization transition. b XAS and XMCD spectra recorded at the Co L 3
edge. A negative voltage induces an oxidation of the Co layer, whereas a positive voltage reduces
the Co layer. c Magnetic hysteresis loop of a V/Fe/MgO sample obtained for two bias voltages
showing a modification of the coercive field. d Fe L 2,3 XAS and XMCD spectra recorded at +4 V
and −4 V. Fe oxidation/reduction is not observed demonstrating that the coercive field modification
is rather attributed to a charge effect. a, b Adapted from [39] with permission (Copyright 2014,
American Physical Society) and c, d from [41] with permission (Copyright 2015, American Institute
of Physics Publishing)
presented showing different strain domains for the CoFe 2 O 4 layer induced by the
BaTiO 3 substrate. By recording XMCD-PEEM images at the Fe L 3 edge, domains
with different magnetic signals are observed. In Fig. 5.13, it appears clearly that a
correlation exists between the strain state and the magnetic signal. Black domains
in the XLD-PEEM [see Fig. 5.13d] correspond to a magnetization along the [100]
direction [see Fig. 5.13a], whereas for white domains, the magnetization is along
the [010] direction [see Fig. 5.13c]. Hence, by performing XLD-PEEM and XMCD-