A flux-coupled ac/dc magnetizing device

D. B. Gopman; H. Liu; A. D. Kent

doi:10.1063/1.4807696

A flux-coupled ac/dc magnetizing device

D. B. Gopman, H. Liu, A. D. Kent

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

Abstract

We report on an instrument for applying ac and dc magnetic fields by capturing the flux from a rotating permanent magnet and projecting it between two adjustable pole pieces. This can be an alternative to standard electromagnets for experiments with small samples or in probe stations in which an applied magnetic field is needed locally, with advantages that include a compact form-factor, very low power requirements and dissipation as well as fast field sweep rates. This flux capture instrument (FLUXCAP) can produce fields from -400 to +400 mT, with field resolution less than 1 mT. It generates static magnetic fields as well as ramped fields, with ramping rates as high as 10 T/s. We demonstrate the use of this apparatus for studying the magnetotransport properties of spin-valve nanopillars, a nanoscale device that exhibits giant magnetoresistance.

Original language	English (US)
Article number	065101
Journal	Review of Scientific Instruments
Volume	84
Issue number	6
DOIs	https://doi.org/10.1063/1.4807696
State	Published - Jun 2013

ASJC Scopus subject areas

Instrumentation

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10.1063/1.4807696

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title = "A flux-coupled ac/dc magnetizing device",

abstract = "We report on an instrument for applying ac and dc magnetic fields by capturing the flux from a rotating permanent magnet and projecting it between two adjustable pole pieces. This can be an alternative to standard electromagnets for experiments with small samples or in probe stations in which an applied magnetic field is needed locally, with advantages that include a compact form-factor, very low power requirements and dissipation as well as fast field sweep rates. This flux capture instrument (FLUXCAP) can produce fields from -400 to +400 mT, with field resolution less than 1 mT. It generates static magnetic fields as well as ramped fields, with ramping rates as high as 10 T/s. We demonstrate the use of this apparatus for studying the magnetotransport properties of spin-valve nanopillars, a nanoscale device that exhibits giant magnetoresistance.",

author = "Gopman, {D. B.} and H. Liu and Kent, {A. D.}",

note = "Funding Information: We appreciate Dr. St{\'e}phane Mangin of Nancy Universit{\'e} and Dr. Eric E. Fullerton of the University of California, San Diego for providing the spin-valve samples used in the characterization of magnetic properties used in this study. We would also like to acknowledge Dr. James Rantschler of Xavier University of Louisiana for fruitful discussions leading to the design of FLUXCAP. This research was supported by NSF Grant Nos. DMR-1006575 and DMR-1309202. ",

year = "2013",

month = jun,

doi = "10.1063/1.4807696",

language = "English (US)",

volume = "84",

journal = "Review of Scientific Instruments",

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publisher = "American Institute of Physics Publising LLC",

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AU - Liu, H.

AU - Kent, A. D.

N1 - Funding Information: We appreciate Dr. Stéphane Mangin of Nancy Université and Dr. Eric E. Fullerton of the University of California, San Diego for providing the spin-valve samples used in the characterization of magnetic properties used in this study. We would also like to acknowledge Dr. James Rantschler of Xavier University of Louisiana for fruitful discussions leading to the design of FLUXCAP. This research was supported by NSF Grant Nos. DMR-1006575 and DMR-1309202.

PY - 2013/6

Y1 - 2013/6

N2 - We report on an instrument for applying ac and dc magnetic fields by capturing the flux from a rotating permanent magnet and projecting it between two adjustable pole pieces. This can be an alternative to standard electromagnets for experiments with small samples or in probe stations in which an applied magnetic field is needed locally, with advantages that include a compact form-factor, very low power requirements and dissipation as well as fast field sweep rates. This flux capture instrument (FLUXCAP) can produce fields from -400 to +400 mT, with field resolution less than 1 mT. It generates static magnetic fields as well as ramped fields, with ramping rates as high as 10 T/s. We demonstrate the use of this apparatus for studying the magnetotransport properties of spin-valve nanopillars, a nanoscale device that exhibits giant magnetoresistance.

AB - We report on an instrument for applying ac and dc magnetic fields by capturing the flux from a rotating permanent magnet and projecting it between two adjustable pole pieces. This can be an alternative to standard electromagnets for experiments with small samples or in probe stations in which an applied magnetic field is needed locally, with advantages that include a compact form-factor, very low power requirements and dissipation as well as fast field sweep rates. This flux capture instrument (FLUXCAP) can produce fields from -400 to +400 mT, with field resolution less than 1 mT. It generates static magnetic fields as well as ramped fields, with ramping rates as high as 10 T/s. We demonstrate the use of this apparatus for studying the magnetotransport properties of spin-valve nanopillars, a nanoscale device that exhibits giant magnetoresistance.

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A flux-coupled ac/dc magnetizing device

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