Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal Conductivity in Magnetic Superconductors   We present here an overview of thermal conductivity behavior in magnetic
superconductors: rare-earth nickel borocarbide intermetallic compounds,
RNi_{2}B_{2}C, and the 2122 rare-earth rutheno-cuprates. The borocarbide family
of intermetallics exhibits the large variety of phenomena - only
superconductivity (R = Y, Lu), coexistence of superconductivity and magnetic
order (R = Tm, Er, Ho, Lu), only magnetic order (R = Tb, Gd), and heavy fermion
behavior (R = Yb) - within the same crystal structure. The rutheno-cuprate
Eu_{1.5}Ce_{0.5}RuSr_2Cu_{2}O_{10-\delta} exhibits coexistence of weak
ferromagnetism and superconductivity at a surprisingly high temperature
(\approx 45 K) and onset of antiferromagnetic order near 200 K. We demonstrate
how coexistence of superconductivity and magnetic order in these compounds is
releaved by the thermal conductivity studies.

31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
23
The categories of this paper are: solv-int
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The categories of this paper are: atom-ph