Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators
  based on magnetic tunnel junctions   We demonstrate field and current controlled magnetodynamics in nanocontact
spin-torque nano-oscillators (STNOs) based on orthogonal magnetic tunnel
junctions (MTJs). We systematically analyze the microwave properties (frequency
$f$, linewidth $\Delta f$, power $P$, and frequency tunability $df/dI$) with
their physical origins---perpendicular magnetic anisotropy (PMA), damping-like
and field-like spin transfer torque (STT), and voltage-controlled magnetic
anisotropy (VCMA). These devices present several advantageous characteristics:
high emission frequencies ($f> 20$ GHz), high frequency tunability
($df/dI=0.25$~GHz/mA), and zero-field operation ($f\sim 4$ GHz). Furthermore, a
detailed investigation of $f(H, I)$ reveals that $df/dI$ is mostly governed by
the large VCMA (287~fJ/(V$\cdot$m)), while STT plays a negligible role.

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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org