Magnetostriction measurement in thin films using laser Doppler vibrometry

Ronnie Varghese, Ravindranath Viswan, Keyur Joshi, Safoura Seifikar, Yuan Zhou, Justin Schwartz, Shashank Priya

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This paper reports the laser Doppler vibrometry based measurement of the magnetostriction in magnetic thin films. Using this method, the strain induced by an AC magnetic field in the polycrystalline cobalt ferrite and nickel ferrite thin films grown on silicon and platinized silicon substrates was measured under a DC magnetic bias. The experimental setup and the derivation of the magnetostriction constant from the experimentally measured deflection values are discussed. The magnetostriction values derived using force and bending moment balances were compared with that derived from an industry standard relationship. In addition, we corroborate our approach by comparing the values derived from bending theory calculations of magnetically induced torque to those from measurements using Vibrating Sample Magnetometer (VSM). At high DC magnetic field bias, the magnitude of magnetization calculated from the measured magnetostriction was found to match the measured magnetization by VSM.

Original languageEnglish (US)
Pages (from-to)179-187
Number of pages9
JournalJournal of Magnetism and Magnetic Materials
Volume363
DOIs
StatePublished - Jan 1 2014

Fingerprint

Magnetostriction
magnetostriction
Thin films
Lasers
Silicon
Magnetometers
thin films
magnetometers
lasers
Ferrite
ferrites
Magnetization
bending theory
direct current
Magnetic fields
Magnetic thin films
bending moments
magnetization
silicon
Bending moments

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Varghese, Ronnie ; Viswan, Ravindranath ; Joshi, Keyur ; Seifikar, Safoura ; Zhou, Yuan ; Schwartz, Justin ; Priya, Shashank. / Magnetostriction measurement in thin films using laser Doppler vibrometry. In: Journal of Magnetism and Magnetic Materials. 2014 ; Vol. 363. pp. 179-187.
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Magnetostriction measurement in thin films using laser Doppler vibrometry. / Varghese, Ronnie; Viswan, Ravindranath; Joshi, Keyur; Seifikar, Safoura; Zhou, Yuan; Schwartz, Justin; Priya, Shashank.

In: Journal of Magnetism and Magnetic Materials, Vol. 363, 01.01.2014, p. 179-187.

Research output: Contribution to journalArticle

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AU - Varghese, Ronnie

AU - Viswan, Ravindranath

AU - Joshi, Keyur

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AU - Schwartz, Justin

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