Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic Magnon Spin Transport in Ultra-thin Spinel Ferrite Thin
  Films -- Evidence for Anisotropy in Exchange Stiffness   We report measurements of magnon spin transport in a spinel ferrite,
magnesium aluminum ferrite $\mathrm{MgAl_{0.5}Fe_{1.5}O_4}$ (MAFO), which has a
substantial in-plane four-fold magnetic anisotropy. We observe spin diffusion
lengths $> 0.8$ $\mathrm{\mu m}$ at room temperature in 6 nm films, with spin
diffusion length 30% longer along the easy axes compared to the hard axes. The
sign of this difference is opposite to the effects just of anisotropy in the
magnetic energy for a uniform magnetic state. We suggest instead that
accounting for anisotropy in exchange stiffness is necessary to explain these
results.

18
The categories of this paper are: econ
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph