TY - JOUR
T1 - Magnons versus electrons in thermal spin transport through metallic interfaces
AU - Beens, M.
AU - Heremans, J.P.
AU - Tserkovnyak, Yaroslav
AU - Duine, R.A.
PY - 2018/10/3
Y1 - 2018/10/3
N2 - We develop a theory for spin transport in magnetic metals that treats the contribution of magnons and electrons on equal footing. As an application, we consider thermally-driven spin injection across an interface between a magnetic metal and a normal metal, i.e. the spin-dependent Seebeck effect. We show that the ratio between magnonic and electronic contribution scales as √ T/T/c
F/Tc, with the Fermi temperature TF and the Curie temperature TC. Since, typically, TC≪ TF, the magnonic contribution may dominate the thermal spin injection, even though the interface is more transparent for electronic spin current.
AB - We develop a theory for spin transport in magnetic metals that treats the contribution of magnons and electrons on equal footing. As an application, we consider thermally-driven spin injection across an interface between a magnetic metal and a normal metal, i.e. the spin-dependent Seebeck effect. We show that the ratio between magnonic and electronic contribution scales as √ T/T/c
F/Tc, with the Fermi temperature TF and the Curie temperature TC. Since, typically, TC≪ TF, the magnonic contribution may dominate the thermal spin injection, even though the interface is more transparent for electronic spin current.
KW - ferromagnetic metal
KW - spin Seebeck effect
KW - spin-dependent Seebeck effect
KW - spintronics
UR - http://www.scopus.com/inward/record.url?scp=85053162599&partnerID=8YFLogxK
U2 - 10.1088/1361-6463/aad520
DO - 10.1088/1361-6463/aad520
M3 - Article
AN - SCOPUS:85053162599
SN - 0022-3727
VL - 51
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 39
M1 - 394002
ER -