Vibrating reed magnetometer studies of superconducting and magnetic materials

L. E. De Long; A. P. Kaphle; B. Farmer

doi:10.1080/14786435.2020.1753895

Vibrating reed magnetometer studies of superconducting and magnetic materials

L. E. De Long, A. P. Kaphle, B. Farmer

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Applications of sensitive vibrating reed magnetometry to a variety of superconducting and magnetic materials are reviewed. The advantages of conducting vibrating reed studies of small single crystals, ceramics, thin films and multilayers with high anisotropy, composition gradients, strain and nonlinear magnetic response are documented. The equilibrium and dynamic properties of magnetic flux in superconductors, and coexistence of magnetic and superconducting states are emphasised. Vibrating reed experiments on Nb, NbSe₂, (Ba_0.6K_0.4)BiO₃, HoNi₂B₂C, {Nb(x)/Ni(y)}_Z multilayer films, and κ-(ET)₂Cu{N(CN)₂}Br have revealed subtle, exotic superconducting behaviours that remain unexplained. Future prospects for vibrating reed measurements of ferromagnetic thin films with patterned nanostructures are considered.

Original language	English
Pages (from-to)	1367-1413
Number of pages	47
Journal	Philosophical Magazine
Volume	100
Issue number	10
DOIs	https://doi.org/10.1080/14786435.2020.1753895
State	Published - May 18 2020

Bibliographical note

Funding Information:
This work was supported by U.S. National Science Foundation, Division of Materials Research Grant No DMR-1506979]. Research at the University of Kentucky was supported by U. S. National Science Foundation Grant No. DMR-1506979. LED would like to thank Prof. J. W. Brill for numerous conversations on vibrating reed techniques, including collaborative endeavours over many years, and W. Fuqua PE for technical assistance in conducting vibrating reed experiments. We thank Dr. Wentao Xu for providing unpublished, atomic-scale TEM images of Nb/Ni ML samples fabricated by Dr. Javier Villegas of the Universidad Complutense de Madrid (now at CNRS-Thales, France). We thank Dr. Amish G. Joshi (National Physical Laboratory, Delhi) for contributing unpublished VR data for Nb/Ni ML.

Funding Information:
Research at the University of Kentucky was supported by U. S. National Science Foundation Grant No. DMR-1506979. LED would like to thank Prof. J. W. Brill for numerous conversations on vibrating reed techniques, including collaborative endeavours over many years, and W. Fuqua PE for technical assistance in conducting vibrating reed experiments. We thank Dr. Wentao Xu for providing unpublished, atomic-scale TEM images of Nb/Ni ML samples fabricated by Dr. Javier Villegas of the Universidad Complutense de Madrid (now at CNRS-Thales, France). We thank Dr. Amish G. Joshi (National Physical Laboratory, Delhi) for contributing unpublished VR data for Nb/Ni ML.

Publisher Copyright:
© 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.

Keywords

Measurements of magnetic anisotropy
magnetic measurements of ferromagnets
magnetic measurements of superconductors
magnetic measurements of thin-films and nanoscale materials
vibrating reed magnetometry

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/14786435.2020.1753895

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title = "Vibrating reed magnetometer studies of superconducting and magnetic materials",

abstract = "Applications of sensitive vibrating reed magnetometry to a variety of superconducting and magnetic materials are reviewed. The advantages of conducting vibrating reed studies of small single crystals, ceramics, thin films and multilayers with high anisotropy, composition gradients, strain and nonlinear magnetic response are documented. The equilibrium and dynamic properties of magnetic flux in superconductors, and coexistence of magnetic and superconducting states are emphasised. Vibrating reed experiments on Nb, NbSe2, (Ba0.6K0.4)BiO3, HoNi2B2C, {Nb(x)/Ni(y)}Z multilayer films, and κ-(ET)2Cu{N(CN)2}Br have revealed subtle, exotic superconducting behaviours that remain unexplained. Future prospects for vibrating reed measurements of ferromagnetic thin films with patterned nanostructures are considered.",

keywords = "Measurements of magnetic anisotropy, magnetic measurements of ferromagnets, magnetic measurements of superconductors, magnetic measurements of thin-films and nanoscale materials, vibrating reed magnetometry",

author = "{De Long}, {L. E.} and Kaphle, {A. P.} and B. Farmer",

note = "Funding Information: This work was supported by U.S. National Science Foundation, Division of Materials Research Grant No DMR-1506979]. Research at the University of Kentucky was supported by U. S. National Science Foundation Grant No. DMR-1506979. LED would like to thank Prof. J. W. Brill for numerous conversations on vibrating reed techniques, including collaborative endeavours over many years, and W. Fuqua PE for technical assistance in conducting vibrating reed experiments. We thank Dr. Wentao Xu for providing unpublished, atomic-scale TEM images of Nb/Ni ML samples fabricated by Dr. Javier Villegas of the Universidad Complutense de Madrid (now at CNRS-Thales, France). We thank Dr. Amish G. Joshi (National Physical Laboratory, Delhi) for contributing unpublished VR data for Nb/Ni ML. Funding Information: Research at the University of Kentucky was supported by U. S. National Science Foundation Grant No. DMR-1506979. LED would like to thank Prof. J. W. Brill for numerous conversations on vibrating reed techniques, including collaborative endeavours over many years, and W. Fuqua PE for technical assistance in conducting vibrating reed experiments. We thank Dr. Wentao Xu for providing unpublished, atomic-scale TEM images of Nb/Ni ML samples fabricated by Dr. Javier Villegas of the Universidad Complutense de Madrid (now at CNRS-Thales, France). We thank Dr. Amish G. Joshi (National Physical Laboratory, Delhi) for contributing unpublished VR data for Nb/Ni ML. Publisher Copyright: {\textcopyright} 2020, {\textcopyright} 2020 Informa UK Limited, trading as Taylor & Francis Group.",

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N2 - Applications of sensitive vibrating reed magnetometry to a variety of superconducting and magnetic materials are reviewed. The advantages of conducting vibrating reed studies of small single crystals, ceramics, thin films and multilayers with high anisotropy, composition gradients, strain and nonlinear magnetic response are documented. The equilibrium and dynamic properties of magnetic flux in superconductors, and coexistence of magnetic and superconducting states are emphasised. Vibrating reed experiments on Nb, NbSe2, (Ba0.6K0.4)BiO3, HoNi2B2C, {Nb(x)/Ni(y)}Z multilayer films, and κ-(ET)2Cu{N(CN)2}Br have revealed subtle, exotic superconducting behaviours that remain unexplained. Future prospects for vibrating reed measurements of ferromagnetic thin films with patterned nanostructures are considered.

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Vibrating reed magnetometer studies of superconducting and magnetic materials

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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