Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures

M.R. Fitzsimmons; N.W. Hengartner; S. Singh; M. Zhernenkov; F.Y. Bruno; J. Santamaria; Alexander Brinkman; Mark Huijben; Hajo Molegraaf; J. de la Venta; Ivan K. Schuller

doi:10.1103/PhysRevLett.107.217201

Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures

M.R. Fitzsimmons, N.W. Hengartner, S. Singh, M. Zhernenkov, F.Y. Bruno, J. Santamaria, Alexander Brinkman, Mark Huijben, Hajo Molegraaf, J. de la Venta, Ivan K. Schuller

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Abstract

Using polarized neutron reflectometry we measured the neutron spin-dependent reflectivity from four LaAlO3/SrTiO3 superlattices. Our results imply that the upper limit for the magnetization averaged over the lateral dimensions of the sample induced by an 11 T magnetic field at 1.7 K is less than 2 G. SQUID magnetometry of the neutron superlattice samples sporadically finds an enhanced moment, possibly due to experimental artifacts. These observations set important restrictions on theories which imply a strongly enhanced magnetism at the interface between LaAlO3 and SrTiO3.

Original language	Undefined
Pages (from-to)	217201-
Journal	Physical review letters
Volume	107
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.107.217201
Publication status	Published - 2011

Keywords

IR-104505
METIS-279867

Access to Document

10.1103/PhysRevLett.107.217201

Cite this

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title = "Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures",

abstract = "Using polarized neutron reflectometry we measured the neutron spin-dependent reflectivity from four LaAlO3/SrTiO3 superlattices. Our results imply that the upper limit for the magnetization averaged over the lateral dimensions of the sample induced by an 11 T magnetic field at 1.7 K is less than 2 G. SQUID magnetometry of the neutron superlattice samples sporadically finds an enhanced moment, possibly due to experimental artifacts. These observations set important restrictions on theories which imply a strongly enhanced magnetism at the interface between LaAlO3 and SrTiO3.",

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author = "M.R. Fitzsimmons and N.W. Hengartner and S. Singh and M. Zhernenkov and F.Y. Bruno and J. Santamaria and Alexander Brinkman and Mark Huijben and Hajo Molegraaf and {de la Venta}, J. and Schuller, {Ivan K.}",

year = "2011",

doi = "10.1103/PhysRevLett.107.217201",

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volume = "107",

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T1 - Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures

AU - Fitzsimmons, M.R.

AU - Hengartner, N.W.

AU - Singh, S.

AU - Zhernenkov, M.

AU - Bruno, F.Y.

AU - Santamaria, J.

AU - Brinkman, Alexander

AU - Huijben, Mark

AU - Molegraaf, Hajo

AU - de la Venta, J.

AU - Schuller, Ivan K.

PY - 2011

Y1 - 2011

N2 - Using polarized neutron reflectometry we measured the neutron spin-dependent reflectivity from four LaAlO3/SrTiO3 superlattices. Our results imply that the upper limit for the magnetization averaged over the lateral dimensions of the sample induced by an 11 T magnetic field at 1.7 K is less than 2 G. SQUID magnetometry of the neutron superlattice samples sporadically finds an enhanced moment, possibly due to experimental artifacts. These observations set important restrictions on theories which imply a strongly enhanced magnetism at the interface between LaAlO3 and SrTiO3.

AB - Using polarized neutron reflectometry we measured the neutron spin-dependent reflectivity from four LaAlO3/SrTiO3 superlattices. Our results imply that the upper limit for the magnetization averaged over the lateral dimensions of the sample induced by an 11 T magnetic field at 1.7 K is less than 2 G. SQUID magnetometry of the neutron superlattice samples sporadically finds an enhanced moment, possibly due to experimental artifacts. These observations set important restrictions on theories which imply a strongly enhanced magnetism at the interface between LaAlO3 and SrTiO3.

KW - IR-104505

KW - METIS-279867

U2 - 10.1103/PhysRevLett.107.217201

DO - 10.1103/PhysRevLett.107.217201

M3 - Article

SN - 0031-9007

VL - 107

SP - 217201-

JO - Physical review letters

JF - Physical review letters

IS - 21

ER -