Magnetic property of Al-Mg alloys and intermetallic compounds

Katsuhiko Nishimura*, Kosuke Imai, Kenji Matsuda, Norio Nunomura, Taiki Tsuchiya, Yosikazu Isikawa, Hiroki Adachi, Wayne D. Hutchison

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Magnetization (M) of binary Al-Mg alloys and intermetallic compounds were measured in the temperature (T) range from 10 to 300 K. The Al-rich alloys Al - 2, 3, 4, 5, and 10 at% Mg) revealed diamagnetic contributions to the magnetization correlating to the Mg concentrations. For the β-phase Al3Mg2 the M vs T curve lay very close to that of pure Mg over the entire measured T region. The magnetization of the γ-phase samples exhibited enhanced paramagnetism for Al44Mg56 and Al12Mg17, but the diamagnetism for Al45Mg55. There were diamagnetic contributions to the magnetization of the Mg-rich alloys (Mg - 5, 10, and 15 at% Al) depending on the Al concentration, possibly due to the γ-phase precipitations. Heat capacity of the γ-phase samples and pure Al were measured to estimate the electronic specific heat coefficients which were found to be almost the same. Density functional theory calculations for the Al-Mg compounds were carried out to aid interpretation of the observed magnetization.

Original languageEnglish
Article number160226
JournalJournal of Alloys and Compounds
Volume877
DOIs
StatePublished - 2021/10/05

Keywords

  • Al-Mg alloys
  • AlMg
  • DFT calculations
  • Diamagnetism
  • Magnetization

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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