Magnetostrictive resonance excitation

Title: Magnetostrictive resonance excitation

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Abstract

The resonance frequency spectrum of a magnetostrictive sample is remotely determined by exciting the magnetostrictive property with an oscillating magnetic field. The permeability of a magnetostrictive material and concomitant coupling with a detection coil varies with the strain in the material whereby resonance responses of the sample can be readily detected. A suitable sample may be a magnetostrictive material or some other material having at least one side coated with a magnetostrictive material. When the sample is a suitable shape, i.e., a cube, rectangular parallelepiped, solid sphere or spherical shell, the elastic moduli or the material can be analytically determined from the measured resonance frequency spectrum. No mechanical transducers are required and the sample excitation is obtained without contact with the sample, leading to highly reproducible results and a measurement capability over a wide temperature range, e.g. from liquid nitrogen temperature to the Curie temperature of the magnetostrictive material.

Inventors:

Schwarz, Ricardo B ^[1]; Kuokkala, Veli-Tapani ^[2]

Los Alamos, NM
Tampere, FI

Publication Date:: 1992-01-01

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

OSTI Identifier:: 868479

Patent Number(s):: US 5150617

Assignee:: United States of America as represented by United States (Washington, DC)

DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: magnetostrictive; resonance; excitation; frequency; spectrum; sample; remotely; determined; exciting; property; oscillating; magnetic; field; permeability; material; concomitant; coupling; detection; coil; varies; strain; whereby; responses; readily; detected; suitable; coated; shape; cube; rectangular; parallelepiped; solid; sphere; spherical; shell; elastic; moduli; analytically; measured; mechanical; transducers; required; obtained; contact; leading; highly; reproducible; results; measurement; capability; wide; temperature; range; liquid; nitrogen; curie; readily detected; spherical shell; material whereby; curie temperature; temperature range; magnetic field; frequency spectrum; resonance frequency; liquid nitrogen; wide temperature; resonance response; highly reproducible; magnetostrictive material; rectangular parallelepiped; mechanical transducer; solid sphere; /73/

Citation Formats


                    Schwarz, Ricardo B, and Kuokkala, Veli-Tapani. Magnetostrictive resonance excitation.  United States: N. p., 1992. 
        Web.

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                    Schwarz, Ricardo B, & Kuokkala, Veli-Tapani. Magnetostrictive resonance excitation.  United States.

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                    Schwarz, Ricardo B, and Kuokkala, Veli-Tapani. Wed .  
        "Magnetostrictive resonance excitation".  United States.  https://www.osti.gov/servlets/purl/868479.

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@article{osti_868479,

  title        = {Magnetostrictive resonance excitation},

  author       = {Schwarz, Ricardo B and Kuokkala, Veli-Tapani},

  abstractNote = {The resonance frequency spectrum of a magnetostrictive sample is remotely determined by exciting the magnetostrictive property with an oscillating magnetic field. The permeability of a magnetostrictive material and concomitant coupling with a detection coil varies with the strain in the material whereby resonance responses of the sample can be readily detected. A suitable sample may be a magnetostrictive material or some other material having at least one side coated with a magnetostrictive material. When the sample is a suitable shape, i.e., a cube, rectangular parallelepiped, solid sphere or spherical shell, the elastic moduli or the material can be analytically determined from the measured resonance frequency spectrum. No mechanical transducers are required and the sample excitation is obtained without contact with the sample, leading to highly reproducible results and a measurement capability over a wide temperature range, e.g. from liquid nitrogen temperature to the Curie temperature of the magnetostrictive material.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/868479},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1992},

  month        = {1}

}

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