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arXiv · 2010.09590

Investigation on structural, electronic and magnetic properties of Co2FeGe Heusler alloy: experiment and theory

Srimanta Mitra·Aquil Ahmad·Shamik Chakrabarti·Sajib Biswas·Amal Kumar Das
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Abstract

Experimental and computational studies were performed on Co2FeGe Heusler alloy. It was found that the alloy has very high experimental magnetic moment of 6.1 muB/f.u., curie temperature of 1073K and very high spin-wave stiffness constant of 10.4 nm2-meV, which indicates that the magnetic moment is very high and do not vary with change in temperature in the range 0-300K. The alloy strictly follows Slater-Pauling (SP) rule and the minor experimental deviation from its SP value is justified by doing full-potential density functional calculations which gives more accurate result when electron-electron correlation parameter (U) is taken into account with conventional GGA method. Effect of lattice strain and electron correlation on individual atomic moments, total magnetic moment and spin-polarization is studied in detail and can be concluded that they have a role in the deviation of the experimental results from the expected theoretical values.

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Srimanta Mitra, Aquil Ahmad, Shamik Chakrabarti, Sajib Biswas, Amal Kumar Das. 2020-10-19. Investigation on structural, electronic and magnetic properties of Co2FeGe Heusler alloy: experiment and theory. https://arxiv.org/abs/2010.09590

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