Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wing structure in the phase diagram of the Ising Ferromagnet URhGe close
  to its tricritical point investigated by angle-resolved magnetization
  measurements   High-precision angle-resolved dc magnetization and magnetic torque studies
were performed on a single-crystalline sample of URhGe, an orthorhombic Ising
ferromagnet with the $c$ axis being the magnetization easy axis, in order to
investigate the phase diagram around the ferromagnetic (FM) reorientation
transition in a magnetic field near the $b$ axis. We have clearly detected
first-order transition in both the magnetization and the magnetic torque at low
temperatures, and determined detailed profiles of the wing structure of the
three-dimensional $T$-$H_{b}$-$H_{c}$ phase diagram, where $H_{c}$ and $H_{b}$
denotes the field components along the $c$ and the $b$ axes, respectively. The
quantum wing critical points are located at $\mu_0H_c\sim\pm$1.1 T and
$\mu_0H_b\sim$13.5 T. Two second-order transition lines at the boundaries of
the wing planes rapidly tend to approach with each other with increasing
temperature up to $\sim 3$ K. Just at the zero conjugate field ($H_c=0$),
however, a signature of the first-order transition can still be seen in the
field derivative of the magnetization at $\sim 4$ K, indicating that the
tricritical point exists in a rather high temperature region above 4 K. This
feature of the wing plane structure is consistent with the theoretical
expectation that three second-order transition lines merge tangentially at the
triciritical point.

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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: eess