Environmental Engineering Reference
In-Depth Information
45
] is a branch of spintronics [
46
]. Whereas the latter
refers to coupled electron spin and charge transport in condensed-matter structures
and devices, spincaloritronics deals with the interaction of spins with heat currents,
with the spin-Seebeck effect and the spin-Peltier effect being the two leading
physical phenomena. Spincaloritronics has only recently emerged and is thus still a
fundamental
Spincaloritronics [
43
-
eld of research. However, it shows a great deal of potential and rapid
developments on the path to useful applications [
43
]. The spin-Seebeck effect
[
47
50
] is a combination of spintronics and the Seebeck effect, where electrical
voltage is generated in the material due to the temperature gradient across the
material. This means that one side of the material is colder than the other. The
-
rst
to demonstrate the spin-Seebeck effect was Uchida in 2008 [
47
]. The phenomenon
of spin-Seebeck is therefore useful for generating electricity. This physical phe-
nomenon is similar to thermoelectric generators. Of course, the spin-Seebeck effect
can be inversely applied by delivering an electric current in order to obtain cooling
and this is called the spin-Peltier effect [
51
54
].
Figure
6.7
is a schematic view of the measurement system for the spin-Peltier
effect [
55
,
56
].
-
Fig. 6.7 An example of a measurement of the spin-Seebeck effect in a Ni
Pt or Fe
Pt pair (see
-
-
also
55
,
56
)
Search WWH ::
Custom Search