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Title: Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7–x grown on top of La0.7Ca0.3MnO3

Abstract

© 2015, Nature Publishing Group. All rights reserved. Studies to date on ferromagnet/d-wave superconductor heterostructures focus mainly on the effects at or near the interfaces while the response of bulk properties to heterostructuring is overlooked. Here we use resonant soft x-ray scattering spectroscopy to reveal a novel c-axis ferromagnetic coupling between the in-plane Cu spins in YBa 2 Cu 3 O 7-x (YBCO) superconductor when it is grown on top of ferromagnetic La 0.7 Ca 0.3 MnO 3 (LCMO) manganite layer. This coupling, present in both normal and superconducting states of YBCO, is sensitive to the interfacial termination such that it is only observed in bilayers with MnO 2 but not with La 0.7 Ca 0.3 O interfacial termination. Such contrasting behaviors, we propose, are due to distinct energetic of CuO chain and CuO 2 plane at the La 0.7 Ca 0.3 O and MnO 2 terminated interfaces respectively, therefore influencing the transfer of spin-polarized electrons from manganite to cuprate differently. Our findings suggest that the superconducting/ferromagnetic bilayers with proper interfacial engineering can be good candidates for searching the theorized Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state in cuprates and studying the competing quantum orders in highly correlated electron systems.

Authors:
 [1];  [2];  [3];  [4];  [5];  [1];  [5];  [1];  [4];  [1];  [1];  [6]
+ Show Author Affiliations
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); New York Univ., New York, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. National Tsing Hua Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
  4. National Chiao Tung Univ., Hsinchu (Taiwan)
  5. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); National Chiao Tung Univ., Hsinchu (Taiwan)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1228034
Alternate Identifier(s):
OSTI ID: 1378650
Grant/Contract Number:  
AC03-76SF00515; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ferromagnetism; magnetic properties and materials; superconducting properties and materials; surfaces, interfaces and thin films

Citation Formats

Huang, S. W., Wray, L. Andrew, Jeng, Horng -Tay, Tra, V. T., Lee, J. M., Langner, M. C., Chen, J. M., Roy, S., Chu, Y. H., Schoenlein, R. W., Chuang, Y. -D., and Lin, J. -Y. Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7–x grown on top of La0.7Ca0.3MnO3. United States: N. p., 2015. Web. doi:10.1038/srep16690.
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Huang, S. W., Wray, L. Andrew, Jeng, Horng -Tay, Tra, V. T., Lee, J. M., Langner, M. C., Chen, J. M., Roy, S., Chu, Y. H., Schoenlein, R. W., Chuang, Y. -D., & Lin, J. -Y. Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7–x grown on top of La0.7Ca0.3MnO3. United States. https://doi.org/10.1038/srep16690
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Huang, S. W., Wray, L. Andrew, Jeng, Horng -Tay, Tra, V. T., Lee, J. M., Langner, M. C., Chen, J. M., Roy, S., Chu, Y. H., Schoenlein, R. W., Chuang, Y. -D., and Lin, J. -Y. Tue . "Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7–x grown on top of La0.7Ca0.3MnO3". United States. https://doi.org/10.1038/srep16690. https://www.osti.gov/servlets/purl/1228034.
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@article{osti_1228034,
title = {Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7–x grown on top of La0.7Ca0.3MnO3},
author = {Huang, S. W. and Wray, L. Andrew and Jeng, Horng -Tay and Tra, V. T. and Lee, J. M. and Langner, M. C. and Chen, J. M. and Roy, S. and Chu, Y. H. and Schoenlein, R. W. and Chuang, Y. -D. and Lin, J. -Y.},
abstractNote = {© 2015, Nature Publishing Group. All rights reserved. Studies to date on ferromagnet/d-wave superconductor heterostructures focus mainly on the effects at or near the interfaces while the response of bulk properties to heterostructuring is overlooked. Here we use resonant soft x-ray scattering spectroscopy to reveal a novel c-axis ferromagnetic coupling between the in-plane Cu spins in YBa 2 Cu 3 O 7-x (YBCO) superconductor when it is grown on top of ferromagnetic La 0.7 Ca 0.3 MnO 3 (LCMO) manganite layer. This coupling, present in both normal and superconducting states of YBCO, is sensitive to the interfacial termination such that it is only observed in bilayers with MnO 2 but not with La 0.7 Ca 0.3 O interfacial termination. Such contrasting behaviors, we propose, are due to distinct energetic of CuO chain and CuO 2 plane at the La 0.7 Ca 0.3 O and MnO 2 terminated interfaces respectively, therefore influencing the transfer of spin-polarized electrons from manganite to cuprate differently. Our findings suggest that the superconducting/ferromagnetic bilayers with proper interfacial engineering can be good candidates for searching the theorized Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state in cuprates and studying the competing quantum orders in highly correlated electron systems.},
doi = {10.1038/srep16690},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {Tue Nov 17 00:00:00 EST 2015},
month = {Tue Nov 17 00:00:00 EST 2015}
}
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https://doi.org/10.1038/srep16690
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