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Title: Constructing a magnetic handle for antiferromagnetic manganites

Abstract

An intrinsic property of antiferromagnetic materials is the compensation of the magnetic moments from the individual atoms that prohibits the direct interaction of the spin lattice with an external magnetic field. To overcome this limitation we have created artificial spin structures by heteroepitaxy between two bulk antiferromagnets SrMnO 3 and NdMnO 3. Here in this paper, we demonstrate that charge transfer at the interface results in the creation of thin ferromagnetic layers adjacent to A -type antiferromagnetism in thick NdMnO 3 layers. A novel interference based neutron diffraction technique and polarized neutron reflectometry are used to confirm the presence of ferromagnetism in the SrMnO 3 layers and to probe the relative alignment of antiferromagnetic spins induced by the coupling at the ferro- to antiferromagnet interface. A density functional theory analysis of the driving forces for the exchange reveals strong ferromagnetic interfacial coupling through quantifiable short range charge transfer. These results confirm a layer-by-layer control of magnetic arrangements that constitutes a promising step on a path towards isothermal magnetic control of antiferromagnetic arrangements as would be necessary in spin-based heterostructures like multiferroic devices.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering and Imaging
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; GLOBALFOUNDRIES Engineering Private Limited, Bangalore (India)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1393817
DOE Contract Number:  
AC05-00OR22725; AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 93; Journal Issue: 14
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Glavic, Artur G., Aczel, Adam A., Dixit, Hemant M., and Cooper, Valentino R. Constructing a magnetic handle for antiferromagnetic manganites. United States: N. p., 2006. Web. doi:10.1103/PhysRevB.93.140413.
Glavic, Artur G., Aczel, Adam A., Dixit, Hemant M., & Cooper, Valentino R. Constructing a magnetic handle for antiferromagnetic manganites. United States. doi:10.1103/PhysRevB.93.140413.
Glavic, Artur G., Aczel, Adam A., Dixit, Hemant M., and Cooper, Valentino R. Thu . "Constructing a magnetic handle for antiferromagnetic manganites". United States. doi:10.1103/PhysRevB.93.140413.
@article{osti_1393817,
title = {Constructing a magnetic handle for antiferromagnetic manganites},
author = {Glavic, Artur G. and Aczel, Adam A. and Dixit, Hemant M. and Cooper, Valentino R.},
abstractNote = {An intrinsic property of antiferromagnetic materials is the compensation of the magnetic moments from the individual atoms that prohibits the direct interaction of the spin lattice with an external magnetic field. To overcome this limitation we have created artificial spin structures by heteroepitaxy between two bulk antiferromagnets SrMnO3 and NdMnO3. Here in this paper, we demonstrate that charge transfer at the interface results in the creation of thin ferromagnetic layers adjacent to A -type antiferromagnetism in thick NdMnO3 layers. A novel interference based neutron diffraction technique and polarized neutron reflectometry are used to confirm the presence of ferromagnetism in the SrMnO3 layers and to probe the relative alignment of antiferromagnetic spins induced by the coupling at the ferro- to antiferromagnet interface. A density functional theory analysis of the driving forces for the exchange reveals strong ferromagnetic interfacial coupling through quantifiable short range charge transfer. These results confirm a layer-by-layer control of magnetic arrangements that constitutes a promising step on a path towards isothermal magnetic control of antiferromagnetic arrangements as would be necessary in spin-based heterostructures like multiferroic devices.},
doi = {10.1103/PhysRevB.93.140413},
journal = {Physical Review B},
number = 14,
volume = 93,
place = {United States},
year = {Thu Apr 27 00:00:00 EDT 2006},
month = {Thu Apr 27 00:00:00 EDT 2006}
}