5 Spintronics and Synchrotron Radiation
151
Fig. 5.13 XMCD-PEEM
(a–c) and XLD-PEEM (d)
images recorded at Fe L 3
edge for a BaTiO 3 /CoFe 2 O 4
sample. XMCD-PEEM
images show magnetic
stripes along the [100] and
[010] directions. These
magnetic stripes are
correlated to domains
observed in the XLD-PEEM
image d which indicates
different strain states of
CoFe 2 O 4 induced by the
BaTiO 3 substrate.
Reproduced from [42] with
permission (Copyright 2012,
American Physical Society)
PEEM measurements, it is possible to locally observe the influence of strain on
magnetism.
We have shown that XAS has allowed determining the origin of the voltage control
of magnetism in NM/FM/oxide structures. In particular, it is possible to disentangle
charge and electromigration effects. By performing PEEM measurements with both
circular and linear polarized X-rays, the correlation between strain and magnetism
can be directly probed. Hence, synchrotron radiation-based measurements are useful
to better understand the mechanisms of the voltage control of magnetism.
5.2.2 Spintronics with Pure Spin Current
The generation of pure spin current from heat, charge current, light or vibration is an
active and promising research field [43]. A wide variety of materials (ferromagnets,
151
Fig. 5.13 XMCD-PEEM
(a–c) and XLD-PEEM (d)
images recorded at Fe L 3
edge for a BaTiO 3 /CoFe 2 O 4
sample. XMCD-PEEM
images show magnetic
stripes along the [100] and
[010] directions. These
magnetic stripes are
correlated to domains
observed in the XLD-PEEM
image d which indicates
different strain states of
CoFe 2 O 4 induced by the
BaTiO 3 substrate.
Reproduced from [42] with
permission (Copyright 2012,
American Physical Society)
PEEM measurements, it is possible to locally observe the influence of strain on
magnetism.
We have shown that XAS has allowed determining the origin of the voltage control
of magnetism in NM/FM/oxide structures. In particular, it is possible to disentangle
charge and electromigration effects. By performing PEEM measurements with both
circular and linear polarized X-rays, the correlation between strain and magnetism
can be directly probed. Hence, synchrotron radiation-based measurements are useful
to better understand the mechanisms of the voltage control of magnetism.
5.2.2 Spintronics with Pure Spin Current
The generation of pure spin current from heat, charge current, light or vibration is an
active and promising research field [43]. A wide variety of materials (ferromagnets,