Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced polarization, magnetoelectric response and possible
  bi-multiferroic phase separation in Tb_{1-x}Ho_xMnO_3   A series of manganites Tb1-xHoxMnO3 (0<=x<=0.6) with orthorhombic structure
are synthesized and detailed investigations on their multiferroicity are
performed. Successive magnetic transitions upon temperature variation are
evidenced for all samples, and both the Mn3+ spiral spin ordering and
rare-earth spin ordering are suppressed with increasing x. Significant
enhancement of both the polarization and magnetoelectric response within
0.2<x<0.4 is observed, which may be ascribed to the competition possibly
existing between spiral and E-type spin orders. Theoretical calculation is
given based on two eg-orbital double-exchange model, and the result supports
the scenario of the multiferroic phase separation.

2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs