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Title: Magnetostrictive resonance excitation

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:
 [1];  [2]
  1. (Los Alamos, NM)
  2. (Tampere, FI)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
868479
Patent Number(s):
US 5150617
Assignee:
United States of America as represented by United States (Washington, DC) LANL
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.
Schwarz, Ricardo B., & Kuokkala, Veli-Tapani. Magnetostrictive resonance excitation. United States.
Schwarz, Ricardo B., and Kuokkala, Veli-Tapani. Wed . "Magnetostrictive resonance excitation". United States. https://www.osti.gov/servlets/purl/868479.
@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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Patent:

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