Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic magnetic-transformation-induced exchange bias in
  (Fe2O3)0.1-(FeTiO3)0.9   Up to now, for the conventional exchange bias (EB) systems there has been one
pinning phase and one pinned phase, and the pinning and pinned phases are
inherent to the material and do not mutually transform into each other.
Interestingly, we show here that EB is observed in a special system
(Fe2O3)0.1(FeTiO3)0.9 (HI9) different from the conventional EB system. Neutron
powder diffraction and magnetic measurement confirm that for HI9: i) two types
of short range antiferromagnetic ordering coexist, ii) there are two pinning
phases and one pinned phase, iii) the pinned phase is not intrinsic to the
structure but can be dynamically produced from the pinning phase with the help
of an external magnetic field. Consequently, two anomalous EB behaviors are
observed: i) both the coercivity (HC) and the exchange bias field (HE)
simultaneously decrease to zero at 30 K, ii) for a high cooling field (Hcool)
HE decreases logarithmically with increasing Hcool. Using Arrott plots it is
confirmed that the first order magnetic phase transformation (FOMPT) from the
AFM Fe2+ to ferromagnetic (FM) Fe2+ and the second order magnetic phase
transformation (SOMPT) for the process whereby the FM Fe2+ aligns with the
external field direction coexist in HI-9. The Morin transition and FOMPT cause
the anomalous EB behaviors. This work may provide fresh ideas for research into
EB behavior.

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The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
19
The categories of this paper are: eess