Manipulating carriers' spin polarization in the Heusler alloy Mn2CoAl

RSC Advances ◽  
2015 ◽  
Vol 5 (90) ◽  
pp. 73814-73819 ◽  
Author(s):  
Jian Zhou ◽  
Baisheng Sa ◽  
Zhimei Sun ◽  
Chen Si ◽  
Rajeev Ahuja
Keyword(s):  
Spin Polarization ◽  
First Principles ◽  
Heusler Alloy ◽  
External Pressures

We report that complete spin polarization and controllable spin polarization of carriers can be simultaneously realized in the Heusler alloy Mn2CoAl simply by applying external pressures based on first-principles studies.

Atom-Rich and Defect Effects on Electronic Structure and Magnetism in Co2MnGe/MgO Heterojunction

2013 ◽  
Vol 275-277 ◽  
pp. 1838-1842
Author(s):  
Feng Cai ◽  
Bo Wu ◽  
Yu Feng ◽  
Ying Chen ◽  
Hong Kuan Yuan ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Spin Polarization ◽  
First Principles ◽  
Heusler Alloy ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Half Metallicity ◽  
Tunnel Magnetoresistance ◽  
Full Heusler

We investigated the atomic rich and defect effects on the half-metallicity of the full-Heusler alloy Co2MnGe from the first principles. Our results show that both Mn-rich and Co-rich could increase the tunnel magnetoresistance (TMR) of the Co2MnGe/MgO magnetic tunnel junctions (MTJs). As for defect, all of investigated Co, Mn and Ge defect show that the spin polarization at Efand the TMR in the MTJs with Co and Mn defect is significatively decreased except for Ge-defected MTJs.

scholarly journals Spin Polarization Properties of Pentagonal PdSe2 Induced by 3D Transition-Metal Doping: First-Principles Calculations

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2339 ◽  
Author(s):  
Xiuwen Zhao ◽  
Bin Qiu ◽  
Guichao Hu ◽  
Weiwei Yue ◽  
Junfeng Ren ◽  
...  
Keyword(s):  
Transition Metal ◽  
Spin Polarization ◽  
First Principles ◽  
Magnetic Moments ◽  
First Principles Calculations ◽  
Density Distributions ◽  
Metal Atoms ◽  
Transition Metal Atoms ◽  
Theoretical Investigations ◽  
Densities Of States

The electronic structure and spin polarization properties of pentagonal structure PdSe2 doped with transition metal atoms are studied through first- principles calculations. The theoretical investigations show that the band gap of the PdSe2 monolayer decreases after introducing Cr, Mn, Fe and Co dopants. The projected densities of states show that p-d orbital couplings between the transition metal atoms and PdSe2 generate new spin nondegenerate states near the Fermi level which make the system spin polarized. The calculated magnetic moments, spin density distributions and charge transfer of the systems suggest that the spin polarization in Cr-doped PdSe2 will be the biggest. Our work shows that the properties of PdSe2 can be modified by doping transition metal atoms, which provides opportunity for the applications of PdSe2 in electronics and spintronics.

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