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Influence of Substrate Crystal Structure on the Magnetic Anisotropy of MnxSi1 – x (x ≈ 0.5) Films
Ist Teil von
Physics of the solid state, 2021-11, Vol.63 (11), p.1638-1642
Ort / Verlag
Moscow: Pleiades Publishing
Erscheinungsjahr
2021
Link zum Volltext
Quelle
SpringerLink (Online service)
Beschreibungen/Notizen
Thin films of Mn
x
Si
1 –
x
(
x
≈ 0.5) alloy were synthesized by pulsed laser deposition in a droplet-free mode on sapphire substrates with different crystallographic cut-off plane orientations (
c
-Al
2
O
3
and
r
-Al
2
O
3
) at various laser energy densities
E
at the polycrystalline target MnSi. X-ray structure properties, as well as static and resonance magnetic characteristics of the films depending on the value of
E
and substrate orientation were investigated. The presence of a ferromagnetic phase with an unusually high Curie temperature
T
C
~ 300 K which is untypical of MnSi single crystals (
T
C
~ 30 K) was revealed in films deposited using high laser energy densities
E
> 6 J/cm
2
at the target. The magnetic moment of the films on
c
-Al
2
O
3
substrates is somewhat larger than in the case of
r
-Al
2
O
3
substrates. Moreover, the films deposited on
c
-Al
2
O
3
substrates show significantly higher values of the effective magnetic anisotropy field 4π
M
eff
, measured by ferromagnetic resonance. Obtained data show that the structure of the substrate has a remarkable influence on the formation process and magnetic properties of the high-temperature ferromagnetic phase in the Mn
x
Si
1 –
x
films.