Effect of Ga substitution on structural and magnetic properties of Fe50Mn25Al25-xGax Heusler alloys

S. S. Mishra, T. P. Yadav, Ram Manohar Yadav, Anand B. Puthirath, Liangzi Deng, Moein Adnani, Ching Wu Chu, Robert Vajtai, P. M. Ajayan, Krishanu Biswas, N. K. Mukhopadhyay, O. N. Srivastava

Research output: Contribution to journalArticlepeer-review

Abstract

Heusler alloys possess the structure of an ordered compound while displaying most of the properties of metals. Numerous magnetic exchange mechanisms may be operating in such systems. Herein, the structural and magnetic properties have been investigated as a function of substitution of Al by Ga in Fe50Mn25Al25-xGax (x = 0, 2.5, 5.0, 7.5, 10.0) quaternary (pseudo-ternary) full Heusler alloys. The X-ray diffraction analysis confirms the substituting Al by Ga promoting the lattice expansion in the L21 crystal structure in Fe50Mn25Al25-xGax alloys. The line scanning profile using energy dispersive X-ray analysis investigations suggests the homogeneous distribution of Ga in all the alloys. The magnetic moment of the alloys was found to be affected by Ga as the antiferromagnetic counterpart increases with Ga. A decrease in the value of Curie temperature was found with increase in Ga content. A second-order magnetic phase transition was observed in the alloys above room temperature.

Original languageEnglish
Article number156756
JournalJournal of Alloys and Compounds
Volume854
DOIs
Publication statusPublished - 2021 Feb 15

All Science Journal Classification (ASJC) codes

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

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