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In this paper we report the Compton profile of β-tin, measured at an intermediate resolution, using 661.65-keV γ-radiation from a 137 Cs source. We have also computed the Compton profiles for α-and β-tin using the CRYSTAL03 code. The Compton profiles within the framework of linear combination of atomic orbitals (LCAO) using Hartree -Fock (HF), density functional (DF) and pseudopotential-HF schemes embodied in the CRYSTAL03 code have been reported for both phases. Good accordance of the experiment for β-tin with the corresponding theoretical profiles has been observed for the LCAO-HF and DF schemes. A real-space analysis of the experimental Compton profile shows the metal-like behavior of β-tin.

The spin-dependent electron momentum densities in Ni(2)MnIn and Ni(2)Mn(1.4)In(0.6) shape memory alloy using magnetic Compton scattering with 182.2 keV circularly polarized synchrotron radiation are reported. The magnetic Compton profiles were measured at different temperatures ranging between 10 and 300 K. The profiles have been analyzed mainly in terms of Mn 3d electrons to determine their role in the formation of the total spin moment. We have also computed the spin polarized energy bands, partial and total density of states, Fermi surfaces and spin moments using full potential linearized augmented plane wave and spin polarized relativistic Korringa-Kohn-Rostoker methods. The total spin moments obtained from our magnetic Compton profile data are explained using both the band structure models. The present Compton scattering investigations are also compared with magnetization measurements.

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