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Ultrafast unidirectional spin Hall magnetoresistance driven by terahertz light field
ellipticity, which can be expressed as follows:
E2Ω,? ISHE E2
0 1sin22χ 1 + sin22χ
, E2Ω, k ISHE =0,
E2Ω,? USMR E2
0 sin 2χ
1 + sin22χ , E2Ω, k
USMR E2 0
1 2ð1 + sin22χÞ ,
ð3Þ
where χ represents the orientation [...] glass (SiO2) substrates and to prevent surface
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0.15
0.20
0.25
0.30
0.35
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0.45 Ta(2nm)/Py(3nm)/Pt(2nm)
Temperature (K)
E R
MS U
/E IS
H E
Ta 2/
Py 3/
Pt 2 2tP/2o
C/2aT
Ta 3/
Py [...] samples. However, both the E2Ω
ISHE and E2Ω USMR contributions are smaller in the Ta(2nm)/
Co(2nm)/Pt(2nm) sample, a point which is discussed further below. In the Ta(2nm)/Py(3nm)/Pt(2nm) sample, the USMR c …
