Magnetic Exchange Coupling in Ferromagnet{bold /}Superconductor{bold /}Ferromagnet Multilayers

Sa de Melo, C A

doi:10.1103/PhysRevLett.79.1933

Title: Magnetic Exchange Coupling in Ferromagnet{bold /}Superconductor{bold /}Ferromagnet Multilayers

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Abstract

The possibility of magnetic exchange coupling between two ferromagnets ({ital F}) separated by a superconductor ({ital S}) spacer is analyzed using the functional integral method. For this coupling to happen three basic conditions need to be satisfied. First, an indirect exchange coupling between the ferromagnets must exist when the superconductor is in its normal state. Second, superconductivity must not be destroyed due to the proximity to ferromagnetic boundaries. Third, roughness of the F/S interfaces must be small. The appearance of the superconducting gap causes a reduction of the indirect exchange coupling existent in the normal state. This reduction is temperature dependent, being weaker near the critical temperature and stronger at zero temperature. {copyright} {ital 1997} {ital The American Physical Society}

Authors:

Sa de Melo, C A ^[1]

Argonne National Laboratory, Materials Science Division, Argonne, Illinois 60439 (United States)

Publication Date:: Mon Sep 01 00:00:00 EDT 1997

OSTI Identifier:: 542281

DOE Contract Number:: W-31-109-ENG-38

Resource Type:: Journal Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 79; Journal Issue: 10; Other Information: PBD: Sep 1997

Country of Publication:: United States

Language:: English

Subject:: 66 PHYSICS; SUPERCONDUCTING FILMS; COUPLING; FERROMAGNETIC MATERIALS; EXCHANGE INTERACTIONS; PROXIMITY EFFECT; COHERENCE LENGTH; TEMPERATURE DEPENDENCE; HIGH-TC SUPERCONDUCTORS

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                    Sa de Melo, C A. Magnetic Exchange Coupling in Ferromagnet{bold /}Superconductor{bold /}Ferromagnet Multilayers.  United States: N. p., 1997. 
        Web.  doi:10.1103/PhysRevLett.79.1933.

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                    Sa de Melo, C A. Magnetic Exchange Coupling in Ferromagnet{bold /}Superconductor{bold /}Ferromagnet Multilayers.  United States.  https://doi.org/10.1103/PhysRevLett.79.1933

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                    Sa de Melo, C A. 1997.  
        "Magnetic Exchange Coupling in Ferromagnet{bold /}Superconductor{bold /}Ferromagnet Multilayers".  United States.  https://doi.org/10.1103/PhysRevLett.79.1933.

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@article{osti_542281,

  title        = {Magnetic Exchange Coupling in Ferromagnet{bold /}Superconductor{bold /}Ferromagnet Multilayers},

  author       = {Sa de Melo, C A},

  abstractNote = {The possibility of magnetic exchange coupling between two ferromagnets ({ital F}) separated by a superconductor ({ital S}) spacer is analyzed using the functional integral method. For this coupling to happen three basic conditions need to be satisfied. First, an indirect exchange coupling between the ferromagnets must exist when the superconductor is in its normal state. Second, superconductivity must not be destroyed due to the proximity to ferromagnetic boundaries. Third, roughness of the F/S interfaces must be small. The appearance of the superconducting gap causes a reduction of the indirect exchange coupling existent in the normal state. This reduction is temperature dependent, being weaker near the critical temperature and stronger at zero temperature. {copyright} {ital 1997} {ital The American Physical Society}},

  doi          = {10.1103/PhysRevLett.79.1933},

  url          = {https://www.osti.gov/biblio/542281},
  journal      = {Physical Review Letters},
number       = 10,

  volume       = 79,

  place        = {United States},

  year         = {Mon Sep 01 00:00:00 EDT 1997},

  month        = {Mon Sep 01 00:00:00 EDT 1997}

}

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