Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crucial role of interfacial $s$-$d$ exchange interaction in the
  temperature dependence of tunnel magnetoresistance   The tunnel magnetoresistance (TMR) is one of the most important spintronic
phenomena but its reduction at finite temperature is a severe drawback for
applications. Here, we reveal a crucial determinant of the drawback, that is,
the $s$-$d$ exchange interaction between conduction $s$ and localized $d$
electrons at interfacial ferromagnetic layers. By calculating the temperature
dependence of the TMR ratio in Fe/MgO/Fe(001), we show that the obtained TMR
ratio significantly decreases with increasing temperature owing to the
spin-flip scattering in the $\Delta_1$ state induced by the $s$-$d$ exchange
interaction. The material dependence of the coupling constant $J_{sd}$ is also
discussed on the basis of a nonempirical method.

6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg