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Title: Field-dependent magnetization of BiFeO 3 in ultrathin La 0.7Sr 0.3MnO 3/BiFeO 3 superlattice

We report the observation of field-induced magnetization of BiFeO 3 (BFO) in an ultrathin La 0.7Sr 0.3MnO 3 (LSMO)/BFO superlattice using polarized neutron reflectivity (PNR). The depth dependent structure and magnetic characterization of subnano layer thick (thickness ~ 0.7 nm each) LSMO/BFO hetrostructure is carried out using X-ray reflectivity and PNR techniques. Our PNR results indicate parallel alignment of magnetization as well as enhancement in magnetic moment across LSMO/BFO interfaces. The study showed an increase in average magnetization on increasing applied magnetic field at 10K. As a result, we observed a saturation magnetization of 110 ± 15 kA/m (~0.8 μ B/Fe) for ultrathin BFO layer (~2 unit cell) sandwiched between ultrathin LSMO layers (~ 2 unit cell).
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Bhabha Atomic Research Centre, Mumbai (India)
Publication Date:
Report Number(s):
LA-UR-15-29159
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:
AC05-00OR22725; AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 22; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; interface magnetic moment; multiferroic and complex oxide hetrostructures; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; material science; thin films, neutron diffraction, multiferroics
OSTI Identifier:
1235821
Alternate Identifier(s):
OSTI ID: 1227752; OSTI ID: 1321773; OSTI ID: 1332075

Fitzsimmons, Michael R., Jia, Quanxi X., Singh, Surendra, Chen, A. P., and Xiong, J.. Field-dependent magnetization of BiFeO3 in ultrathin La0.7Sr0.3MnO3/BiFeO3 superlattice. United States: N. p., Web. doi:10.1103/PhysRevB.92.224405.
Fitzsimmons, Michael R., Jia, Quanxi X., Singh, Surendra, Chen, A. P., & Xiong, J.. Field-dependent magnetization of BiFeO3 in ultrathin La0.7Sr0.3MnO3/BiFeO3 superlattice. United States. doi:10.1103/PhysRevB.92.224405.
Fitzsimmons, Michael R., Jia, Quanxi X., Singh, Surendra, Chen, A. P., and Xiong, J.. 2015. "Field-dependent magnetization of BiFeO3 in ultrathin La0.7Sr0.3MnO3/BiFeO3 superlattice". United States. doi:10.1103/PhysRevB.92.224405. https://www.osti.gov/servlets/purl/1235821.
@article{osti_1235821,
title = {Field-dependent magnetization of BiFeO3 in ultrathin La0.7Sr0.3MnO3/BiFeO3 superlattice},
author = {Fitzsimmons, Michael R. and Jia, Quanxi X. and Singh, Surendra and Chen, A. P. and Xiong, J.},
abstractNote = {We report the observation of field-induced magnetization of BiFeO3 (BFO) in an ultrathin La0.7Sr0.3MnO3 (LSMO)/BFO superlattice using polarized neutron reflectivity (PNR). The depth dependent structure and magnetic characterization of subnano layer thick (thickness ~ 0.7 nm each) LSMO/BFO hetrostructure is carried out using X-ray reflectivity and PNR techniques. Our PNR results indicate parallel alignment of magnetization as well as enhancement in magnetic moment across LSMO/BFO interfaces. The study showed an increase in average magnetization on increasing applied magnetic field at 10K. As a result, we observed a saturation magnetization of 110 ± 15 kA/m (~0.8 μB/Fe) for ultrathin BFO layer (~2 unit cell) sandwiched between ultrathin LSMO layers (~ 2 unit cell).},
doi = {10.1103/PhysRevB.92.224405},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 22,
volume = 92,
place = {United States},
year = {2015},
month = {12}
}