Spin-polarized electron momentum density distributions in Pd<inf>1-x</inf>Co<inf>x</inf>alloys

• Main Authors: J. W. Taylor, J. A. Duffy, J. Poulter, A. M. Bebb, M. J. Cooper, J. E. McCarthy, D. N. Timms, J. B. Staunton, F. Itoh, H. Sakurai, B. L. Ahuja
• Other Authors: The University of Warwick
• Format: Article
• Published: 2018
• Subjects: Materials Science; Physics and Astronomy
• Online Access: https://repository.li.mahidol.ac.th/handle/123456789/20243
• Institution: Mahidol University

The spin-polarized momentum densities of disordered single-crystal Pd1-xCoxhave been studied using the magnetic Compton scattering technique, for the compositions x = 0.6 and 0.28. Magnetic Compton profiles have been measured along the three principle crystallographic directions in each sample, and compared with theoretical profiles calculated using the Korringa-Kohn-Rostoker coherent-potential approximation method. The calculated and measured spin-polarized momentum distributions, as revealed by their magnetic Compton profiles, are in excellent agreement. However the calculated spin moment for the composition with x = 0.6 is some 10% smaller than that measured experimentally, and for x = 0.28, the deviation becomes 15%. These differences are attributed to the effect of order in the samples, which becomes increasingly important in the Pd-rich side of the phase diagram. The orbital component to the magnetization has been determined as 0.08 and 0.18μBfor Pd0.4Co0.6and Pd0.72Co0.28, respectively.