Tomoki Tsuchiya
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View article: Lattice Softening in Metastable bcc <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msub><mml:mi>Co</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mrow><mml:mn>100</mml:mn><mml:mstyle displaystyle="false" scriptlevel="0"><mml:mtext>−</mml:mtext></mml:mstyle><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math> (001) Ferromagnetic Layers for a Strain-Free Magnetic Tunnel Junction
Lattice Softening in Metastable bcc (001) Ferromagnetic Layers for a Strain-Free Magnetic Tunnel Junction Open
In spintronics, one of the long-standing questions is why the MgO-based magnetic tunnel junction (MTJ) is almost the only option for achieving a large tunneling magnetoresistance (TMR) ratio at room temperature, although this is not as lar…
View article: Microstructures and Interface Magnetic Moments in Mn2VAl/Fe Layered Films Showing Exchange Bias
Microstructures and Interface Magnetic Moments in Mn2VAl/Fe Layered Films Showing Exchange Bias Open
Heusler alloys are a material class exhibiting various magnetic properties, including antiferromagnetism. A typical application of antiferromagnets is exchange bias that is a shift of the magnetization curve observed in a layered structure…
View article: Structural and magnetic properties of epitaxial films of CoIrMnAl equiatomic quaternary Heusler alloy designed from first-principles calculation
Structural and magnetic properties of epitaxial films of CoIrMnAl equiatomic quaternary Heusler alloy designed from first-principles calculation Open
MgO-barrier magnetic tunnel junctions with half-metallic Heusler alloy electrodes attracted much attentions for spintronics applications. However, a couples of issues related to materials still remain to be resolved for practical uses. Rec…
View article: Lattice Softening in Metastable bcc CoxMn100-x(001) Ferromagnetic Layers for a Strain-Less Magnetic Tunnel Junction
Lattice Softening in Metastable bcc CoxMn100-x(001) Ferromagnetic Layers for a Strain-Less Magnetic Tunnel Junction Open
In spintronics, one of the long standing questions is why the MgO-based magnetic tunnel junction (MTJ) is almost the only option to achieve a large tunnelling magnetoresistance (TMR) ratio at room temperature (RT) but not as large as the t…
View article: High tunnel magnetoresistance and magnetism in metastable bcc Co$_{1-x}$Mn$_x$-based magnetic tunnel junctions
High tunnel magnetoresistance and magnetism in metastable bcc Co$_{1-x}$Mn$_x$-based magnetic tunnel junctions Open
Co-rich Co$_{1-x}$Mn$_x$ alloys have hcp or fcc disordered phases and those ferromagnetic orderings are significantly deteriorated with increasing Mn concentration $x$ in bulk. On the other hand, those metastable bcc phases show properties…
View article: Magnetic tunnel junctions with metastable bcc Co<sub>3</sub>Mn electrodes
Magnetic tunnel junctions with metastable bcc Co<sub>3</sub>Mn electrodes Open
We studied magnetic tunnel junctions (MTJs) with a MgO(001) barrier and metastable bcc Co3Mn(001) disordered alloy electrodes. A tunnel magnetoresistance (TMR) ratio was approximately 200{250% observed at room temperature.We successfully o…
View article: Development of antiferromagnetic Heusler alloys for the replacement of iridium as a critically raw material
Development of antiferromagnetic Heusler alloys for the replacement of iridium as a critically raw material Open
As a platinum group metal, iridium (Ir) is the scarcest element on the earth but it has been widely used as an antiferromagnetic layer in magnetic recording, crucibles and spark plugs due to its high melting point. In magnetic recording, a…