First-Principles Disordered Local-Moment Study on Temperature Dependence of Spin Polarization in Co2Fe(Ga0.5Ge0.5) Heusler Alloy

2021 ◽  
pp. 117218
Author(s):  
Ivan Kurniawan ◽  
Kenji Nawa ◽  
Keisuke Masuda ◽  
Yoshio Miura ◽  
Kazuhiro Hono
Keyword(s):  
Temperature Dependence ◽  
Spin Polarization ◽  
First Principles ◽  
Heusler Alloy ◽  
Local Moment

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.

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