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  • 2005-2009  (3)
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  • 2005-2009  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic Compton Scattering Study of Shape Memory Alloys (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 52 (June 2008), p. 145-154 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The Compton profile, projection of electron momentum density distribution along the scatteringvector, is very sensitive to the behavior of valence electrons in a variety of materials. In this papertheoretical aspects related to measurement of spin momentum densities of magnetic materials usingCompton scattering is reviewed. To highlight the potential of the magnetic Compton scattering, thespin momentum densities in Ni-Mn-Ga Heusler alloys at various temperatures and magnetic fieldsare presented. The magnetic Compton profiles are mainly analyzed in terms of the contributionfrom the 3d electrons of Mn. A comparison of the magnetic Compton data with other magnetizationstudies illustrates its importance in exploring the magnetic effects in ferro- or ferri-magneticmaterials
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.52.145.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A Charge Compton Profile Study of Ni〈sub〉2〈/sub〉MnGa: Theory and Experiment (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 52 (June 2008), p. 181-186 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: We present the first ever theoretical and experimental charge Compton profiles of Ni2MnGaHeusler alloy. The measurements have been made using magnetic Compton spectrometer atSPring8, Japan. The Compton profiles and energy bands have been computed using Hartree-Fock,density functional theory with local density and generalized gradient approximations. It is seen thatthe Hartree-Fock based Compton profile is relatively in better agreement with the experimentalprofiles. In addition, we also report the energy bands, density of states and valence charge densitiesusing full potential linearized augmented plane-wave method
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.52.181.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Magneto-Transport and Magnetic Properties of Ni-Mn-Ga (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 52 (June 2008), p. 207-213 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: We report a detailed investigation of the magneto-transport and magnetic properties ofMn excess Ni-Mn-Ga using the resistivity and magnetization measurements. Magnetoresistance(MR) has been measured in the ferromagnetic state for different compositions in the austenitic, premartensiticand martensitic phases. With Mn doping in Ni2-yMn1+yGa, a decrease in magnetizationand MR has been found, since the doped Mn atoms in Ni position are in the antiferromagneticconfiguration with the Mn atoms in Mn position. MR for the parent stoichiometric compositionNi2MnGa varies almost linearly with field in the austenitic and pre-martensitic phases, and shows acusp-like shape in the martensitic phase. This has been explained by the changes in twin and domainstructures in the martensitic phase. Hysteresis in the heating and cooling cycles is a characteristic ofthe first order nature of the martensitic phase transition
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.52.207.pdf
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    Paper (German National Licenses)
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