Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A versatile rotary-stage high frequency probe station for studying
  magnetic films and devices   We present a rotary-stage microwave probe station suitable for magnetic films
and spintronic devices. Two stages, one for field rotation from parallel to
perpendicular to the sample plane (Out-of-Plane) and the other intended for
field rotation within the sample plane (In-Plane) have been designed. The
sample, probes and micro positioners are rotated simultaneously with the
stages, which allows the field orientation to cover $\theta$ from 0 to
$90^{\circ}$ and $\varphi$ from 0 to $360^{\circ}$. $\theta$ and $\varphi$
being the angle between the direction of current flow and field in a
Out-of-Plane and an In-Plane rotation, respectively. The operation frequency is
up to 40 GHz and the magnetic field up to 1 T. The sample holder, vision system
and probe assembly are compactly designed for the probes to land on a wafer
with diameter up to 3$\,$cm. Using homemade multi-pin probes and commercially
available high frequency probes, several applications including 4-probe DC
measurements, the determination of domain wall velocity and spin transfer
torque ferromagnetic resonance are demonstrated.

10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th