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Fitzsimmons MR, Hengartner NW, Singh S, et al. Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures. Phys Rev Lett. 2011;107(21):217201doi: 10.1103/PhysRevLett.107.217201.
Fitzsimmons, M. R., Hengartner, N. W., Singh, S., Zhernenkov, M., Bruno, F. Y., Santamaria, J., Brinkman, A., Huijben, M., Molegraaf, H. J., de la Venta, J., & Schuller, I. K. (2011). Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures. Physical review letters, 107(21), 217201. https://doi.org/10.1103/PhysRevLett.107.217201
Fitzsimmons, M R, et al. "Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures." Physical review letters vol. 107,21 (2011): 217201. doi: https://doi.org/10.1103/PhysRevLett.107.217201
Fitzsimmons MR, Hengartner NW, Singh S, Zhernenkov M, Bruno FY, Santamaria J, Brinkman A, Huijben M, Molegraaf HJ, de la Venta J, Schuller IK. Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures. Phys Rev Lett. 2011 Nov 18;107(21):217201. doi: 10.1103/PhysRevLett.107.217201. Epub 2011 Nov 14. PMID: 22181916.
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Phys Rev Lett. 2011 Nov 18;107(21):217201. doi: 10.1103/PhysRevLett.107.217201. Epub 2011 Nov 14.

Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures.

Physical review letters

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

Affiliations

  1. Los Alamos National Laboratory, New Mexico 87545, USA.

PMID: 22181916 DOI: 10.1103/PhysRevLett.107.217201

Abstract

Using polarized neutron reflectometry we measured the neutron spin-dependent reflectivity from four LaAlO(3)/SrTiO(3) 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 LaAlO(3) and SrTiO(3).

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