Abnormal expansion during the ferro- to para-magnetic transition in pure iron

Jihye Park, Minsu Jung, Young Kook Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The strain change near the Curie temperature was investigated during continuous heating of pure iron using two different types of dilatometers with and without a radio frequency (RF) field. Contrary to the well-known fact that the ferro- to para-magnetic transition accompanies volumetric contraction, abnormal expansion was observed near the Curie temperature only when the quench dilatometer employing the RF field for heating was used. The abnormal expansion was caused primarily by the change in electron-phonon interaction under the RF field.

Original languageEnglish
Pages (from-to)193-196
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume377
DOIs
Publication statusPublished - 2015 Mar 1

Fingerprint

radio frequencies
extensometers
Dilatometers
Iron
Curie temperature
iron
expansion
Heating
Electron-phonon interactions
heating
electron phonon interactions
contraction

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Abnormal expansion during the ferro- to para-magnetic transition in pure iron. / Park, Jihye; Jung, Minsu; Lee, Young Kook.

In: Journal of Magnetism and Magnetic Materials, Vol. 377, 01.03.2015, p. 193-196.

Research output: Contribution to journalArticle

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AU - Park, Jihye

AU - Jung, Minsu

AU - Lee, Young Kook

PY - 2015/3/1

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N2 - The strain change near the Curie temperature was investigated during continuous heating of pure iron using two different types of dilatometers with and without a radio frequency (RF) field. Contrary to the well-known fact that the ferro- to para-magnetic transition accompanies volumetric contraction, abnormal expansion was observed near the Curie temperature only when the quench dilatometer employing the RF field for heating was used. The abnormal expansion was caused primarily by the change in electron-phonon interaction under the RF field.

AB - The strain change near the Curie temperature was investigated during continuous heating of pure iron using two different types of dilatometers with and without a radio frequency (RF) field. Contrary to the well-known fact that the ferro- to para-magnetic transition accompanies volumetric contraction, abnormal expansion was observed near the Curie temperature only when the quench dilatometer employing the RF field for heating was used. The abnormal expansion was caused primarily by the change in electron-phonon interaction under the RF field.

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