Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perovskite-type cobalt oxide at the multiferroic Co/Pb
  Zr$_{0.2}$Ti$_{0.8}$O$_{3}$ interface   Magnetic Tunnel Junctions whose basic element consists of two ferromagnetic
electrodes separated by an insulating non-magnetic barrier have become
intensely studied and used in non-volatile spintronic devices. Since ballistic
tunnel of spin-polarized electrons sensitively depends on the chemical
composition and the atomic geometry of the lead/barrier interfaces their proper
design is a key issue for achieving the required functionality of the devices
such as e.g. a high tunnel magneto resistance. An important leap in the
development of novel spintronic devices is to replace the insulating barrier by
a ferroelectric which adds new additional functionality induced by the
polarization direction in the barrier giving rise to the tunnel electro
resistance (TER). The multiferroic tunnel junction
Co/PbZr$_{0.2}$Ti$_{0.8}$O$_{3}$/La$_{2/3}$Sr$_{1/3}$MnO$_3$ (Co/PZT/LSMO)
represents an archetype system for which - despite intense studies - no
consensus exists for the interface geometry and their effect on transport
properties. Here we provide the first analysis of the Co/PZT interface at the
atomic scale using complementary techniques, namely x-ray diffraction and
extended x-ray absorption fine structure in combination with x-ray magnetic
circular dichroism and ab-initio calculations. The Co/PZT interface consists of
one perovskite-type cobalt oxide unit cell [CoO$_{2}$/CoO/Ti(Zr)O$_{2}$] on
which a locally ordered cobalt film grows. Magnetic moments (m) of cobalt lie
in the range between m=2.3 and m=2.7$\mu_{B}$, while for the interfacial
titanium atoms they are small (m=+0.005 $\mu_{B}$) and parallel to cobalt which
is attributed to the presence of the cobalt-oxide interface layers. These
insights into the atomistic relation between interface and magnetic properties
is expected to pave the way for future high TER devices.

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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc