Quantification of site disorder and its role on spin polarization in the nearly half-metallic Heusler alloy NiFeMnSn

2016 ◽  
Vol 94 (21) ◽  
Author(s):  
M. D. Mukadam ◽  
Syamashree Roy ◽  
S. S. Meena ◽  
Pramod Bhatt ◽  
S. M. Yusuf
Keyword(s):  
Spin Polarization ◽  
Heusler Alloy ◽  
Half Metallic ◽  
Site Disorder

Ferromagnetic Material of the Nearly Half-Metallic Alloy Co2TiGa

2013 ◽  
Vol 690-693 ◽  
pp. 590-593 ◽  
Author(s):  
Hong Pei Han
Keyword(s):  
Spin Polarization ◽  
Heusler Alloy ◽  
Ferromagnetic Material ◽  
Full Potential ◽  
Half Metallic ◽  
Augmented Plane Wave ◽  
Plane Wave Method ◽  
Linearized Augmented Plane Wave ◽  
Full Heusler ◽  
Metallic Ferromagnetism

The structure, electronic and magnetic properties of full-Heusler alloy Co2TiGa are investigated by means of the full potential linearized augmented plane-wave method. Our results show that the ground state of Co2TiGa is of the nearly half-metallic ferromagnetism with a magnetic moment of 1.00218μBper unit cell, which are contributed by the atoms Co and Ti. Meanwhile, the spin polarization around the Fermi level is up to 93.2%, almost 100%, which indicates that full-Heusler alloy Co2TiGa with the well magnetism and spin polarization would be possibly applied to the field of the material engineering and information technology.

scholarly journals A Landau-Ginzburg Description of Sb Overlayers

2001 ◽  
Vol 674 ◽  
Author(s):  
R. Skomski ◽  
T. Komesu ◽  
H.-K. Jeong ◽  
C. N. Borca ◽  
P. A. Dowben ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Heusler Alloy ◽  
Function Approximation ◽  
Gaussian Approximation ◽  
Temperature Dependent ◽  
Half Metallic ◽  
Spin Polarized ◽  
Spin Excitations ◽  
Injection Depth ◽  
Inverse Photoemission Spectroscopy

ABSTRACTThe spin polarization of Sb overlayers on the semi-Heusler alloy NiMnSb is investigated in terms of the Landau-Ginzburg approach. The half-metallic semi-Heusler alloy NiMnSb acts as a ferromagnetic perturbation and induces a spin polarization in the semimetallic Sb overlayer. Using a Gaussian approximation, the propagation of the spin perturbation in the overlayer is calculated. The results are compared with spin-polarized inverse photoemission spectroscopy (SPIPES) results and with recent spin-dependent envelope-function approximation (SDEFA) predictions. The Landau-Ginzburg parameters are both band-structure and temperature dependent, and it is argued that thermal spin excitations lead to an injection depth decreasing as 1//T law at high temperatures.

scholarly journals Tunnel magnetoresistance effect and magnetic damping in half-metallic Heusler alloys

2011 ◽  
Vol 369 (1948) ◽  
pp. 3037-3053 ◽  
Author(s):  
M. Oogane ◽  
S. Mizukami
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Heusler Alloy ◽  
Heusler Alloys ◽  
Magnetoresistance Effect ◽  
Half Metallicity ◽  
Half Metallic ◽  
Tunnel Magnetoresistance ◽  
Magnetic Damping ◽  
High Spin Polarization

Some full-Heusler alloys, such as Co 2 MnSi and Co 2 MnGe, are expected to be half-metallic ferromagnetic material, which has complete spin polarization. They are the most promising materials for realizing half-metallicity at room temperature owing to their high Curie temperature. We demonstrate a huge tunnel magnetoresistance effect in a magnetic tunnel junction using a Co 2 MnSi Heusler alloy electrode. This result proves high spin polarization of the Heusler alloy. We also demonstrate a small magnetic damping constant in Co 2 FeAl epitaxial film. The very high spin polarization and small magnetic constant of Heusler alloys will be a great advantage for future spintronic device applications.

Investigation of atomic anti-site disorder and ferrimagnetic order in the half-metallic Heusler alloy Mn2V Ga

2012 ◽  
Vol 24 (33) ◽  
pp. 336007 ◽  
Author(s):  
K Ramesh Kumar ◽  
N Harish Kumar ◽  
P D Babu ◽  
S Venkatesh ◽  
S Ramakrishnan
Keyword(s):  
Heusler Alloy ◽  
Half Metallic ◽  
Site Disorder

scholarly journals The antiphase boundary in half-metallic Heusler alloy Co2Fe(Al,Si): atomic structure, spin polarization reversal, and domain wall effects

2016 ◽  
Vol 109 (22) ◽  
pp. 222405 ◽  
Author(s):  
Zlatko Nedelkoski ◽  
Ana M. Sanchez ◽  
Arsham Ghasemi ◽  
Kohei Hamaya ◽  
Richard F. L. Evans ◽  
...  
Keyword(s):  
Domain Wall ◽  
Spin Polarization ◽  
Atomic Structure ◽  
Heusler Alloy ◽  
Antiphase Boundary ◽  
Polarization Reversal ◽  
Wall Effects ◽  
Half Metallic

Spin polarization of field-emitted electrons from ferromagnetic half-metallic Heusler alloy Co2MnSi

2008 ◽  
Vol 40 (13) ◽  
pp. 1673-1676 ◽  
Author(s):  
Shigekazu Nagai ◽  
Yuji Fujiwara ◽  
Koichi Hata
Keyword(s):  
Spin Polarization ◽  
Heusler Alloy ◽  
Half Metallic
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