Spin-resolved Fermi surface of the localized ferromagnetic Heusler compound Cu${}_2$MnAl measured with spin-polarized positron annihilation

Abstract

We determined the bulk electronic structure in the prototypical Heusler compound Cu${}_2$MnAl by measuring the Angular Correlation of Annihilation Radiation (2D-ACAR) using spin-polarized positrons. To this end, a new algorithm for reconstructing 3D densities from projections is introduced that allows us to corroborate the excellent agreement between our electronic structure calculations and the experimental data. The contribution of each individual Fermi surface sheet to the magnetization was identified, and summed to a total spin magnetic moment of $3.6\pm 0.5{\mu }_B/f.u.$.

References in corpus (7)

• Realization of spin gapless semiconductors: the Heusler compound Mn2CoAl
• Role of the conduction electrons in mediating exchange interactions in Heusler alloys
• Proposed parameter-free model for interpreting the measured positron annihilation spectra of materials using a generalized gradient approximation
• Calculating electron momentum densities and Compton profiles using the linear tetrahedron method
• Optical floating zone growth of high-quality Cu2MnAl single crystals
• Cancellation of probe effects in measurements of spin polarized momentum density by electron positron annihilation
• Quality of Heusler Single Crystals Examined by Depth Dependent Positron Annihilation Techniques

Cited by in corpus (10)

• Positrons in Surface Physics
• Variational and Diffusion Quantum Monte Carlo Calculations with the CASINO Code
• Correlation in noncollinear antiferromagnetic $\alpha$-Mn
• Ultra-high vacuum compatible induction-heated rod casting furnace
• Positron surface state as a spectroscopic probe for characterizing surfaces of topological insulator materials
• Electronic Correlations in Vanadium Revealed by Electron-Positron Annihilation Measurements
• Momentum Density Spectroscopy of Pd: Comparison of 2D-ACAR and Compton Scattering Using a New 1D-to-2D Reconstruction Method
• Fermi-Surface Modeling of Light-Rare-Earth Hexaborides with 2D-ACAR Spectroscopy
• An investigation of the sensitivity of the Fermi surface to the treatment of exchange and correlation
• Fermi surface determination from momentum density projections