Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heterobimetallic Dy-Cu coordination compound as a classical-quantum
  ferrimagnetic chain of regularly alternating Ising and Heisenberg spins   A classical-quantum chain composed of regularly alternating Ising and
Heisenberg spins is rigorously solved by considering two distinct local
anisotropy axes of the Ising spins. The ground-state phase diagram and
magnetization curves are examined depending on a spatial orientation of the
applied magnetic field. The phase diagram totally consists of four distinct
phases and a few macroscopically degenerate points, where an outstanding
coexistence of perfect order and complete disorder occurs within the so-called
'half-fire, half-ice' state. The zero-temperature magnetization curves
generally exhibit a smooth dependence on a magnetic field owing to a canting
angle between two coplanar anisotropy axes of the Ising spins, which enforces a
misalignment of the magnetization vector from a direction of the applied
magnetic field. It is evidenced that the investigated spin-chain model
reproduces magnetic features of the heterobimetallic coordination compound
Dy(NO)$_{3}$(DMSO)$_{2}$Cu(opba)(DMSO)$_{2}$ (DMSO=dimethylsulfoxide,
opba=orthophenylenebisoxamato). The high-field magnetization data reported for
the powder sample of this polymeric coordination compound generally display a
substantial smoothing on account of a powder averaging.

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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con