An experimental and theoretical investigation on structure-property correlation of Cu2Mn1Al1−xGax full-Heusler alloy

Shashank Shekhar Mishra, Anurag Bajpai, Thakur Prasad Yadav, Ram Manohar Yadav, Anand B. Puthirath, Liangzi Deng, Moein Adnani, Ching Wu Chu, Robert Vajtai, Pulickel M. Ajayan, Krishanu Biswas, Nilay Krishna Mukhopadhyay

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摘要

The present study reports the evolution of microstructure and magnetic properties of Cu2MnAl1−xGax Heusler alloys. The L21 phase, which remained stable up to a Ga substitution of x = 0.3, transformed into mixed phases, i.e., hexagonal close packed (HCP) and complex cubic structure (CCS) on further addition of Ga. The non-monotonic increase in the lattice constant indicates that some amount of Ga retains its monovalent state. The magnetic phase showed a transition from ferromagnetic to paramagnetic state with increasing Ga concentration. The re-entrant temperature (TR) decreased from 8.2 K to 5.2 K as Ga content increased from 5 at% to 10 at%. The strength of magnetic exchange-coupling also reduced with an increase in Ga content. Gaussian process regression (GPR) was used to estimate the lattice parameter using the ionic radii and Pauling electronegativity of the constituents. The modeling approach showed high accuracy and stability, providing new insights into future alloy development.

原文English
文章編號162865
期刊Journal of Alloys and Compounds
898
DOIs
出版狀態Published - 2022 3月 25

All Science Journal Classification (ASJC) codes

  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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