Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dielectric and Magnetic Properties of (Bi1-xLaxFeO3)0.5(PbTiO3)0.5
  Ceramics Prepared from Mechanically Synthesized Powders   Multiferroic (Bi1-xLaxFeO3)0.5(PbTiO3)0.5 ceramics was prepared from
mechanical synthesized nanopowders. The XRD studies revealed the tetragonal
structure and the tetragonality decreased with La content. Dielectric response
of the compounds was found to contain three anomalies: 1) relaxor-like behavior
due to lattice disorder (below 300 K); 2) dielectric permittivity maxima at~400
K attributed to the presence of oxygen vacancies; 3) grain boundary effect
above 475 K. The Curie point at ~500 K was observed for the compound with
x=0.5. The composition near the morphotropic boundary:
(Bi0.8La0.2FeO3)0.5(PbTiO3)0.5 shoved the highest remnant magnetization. The
irreversible magnetic properties of the (Bi1-xLaxFeO3)0.5(PbTiO3)0.5 compounds
can be explained in terms of disorder induced spin-glass behavior due to random
substitution of La or Pb ions for Bi sites. A sharp step in magnetization about
250 K is caused by the A-site distortion associated with tilts of FeO6
octahedra leading to modification of Fe-O-Fe angles and of antiferromagnetic
coupling between magnetic Fe3+ moments.

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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex