Abstract
We report on novel ferromagnetic Mn/Ge multilayers for spintronics applications investigated both experimentally and theoretically. Two Mn/Ge multilayers are grown on GaAs (001) substrates by molecular beam epitaxy. The period of each multilayer consists of an Mn layer of varying thickness (0.6 and 5 Å) and a 10 Å thick Ge spacer layer. From temperaturedependent magnetization and hysteresis loop measurements, the Mn (0.6 Å)/Ge (10 Å) multilayer showed very weak ferromagnetic ordering, which is persistent up to 260 K, whereas the Mn (5 Å)/Ge (10 Å) multilayer exhibited strong ferromagnetism up to 305 K. The coercive field of the Mn (5 Å)/Ge (10 Å) multilayer was 277 Oe at 200 K. Density functional electronic band structure calculations on a number of Mn/Ge (001) multilayers determined them to be ferromagnetic, and estimates of their critical temperatures are reported.
| Original language | English |
|---|---|
| Pages (from-to) | 335-338 |
| Number of pages | 4 |
| Journal | Journal of Superconductivity and Novel Magnetism |
| Volume | 18 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2005 |
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Keywords
- Ferromagnetism
- MBE
- Mn/Ge multilayers
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Physics and Astronomy (miscellaneous)
Cite this
Ferromagnetism of Mn/Ge multilayers grown by molecular beam epitaxy. / Lee, J. J.; Medvedeva, J. E.; Song, J. H.; Cui, Y.; Freeman, Arthur J; Ketterson, J. B.
In: Journal of Superconductivity and Novel Magnetism, Vol. 18, No. 3, 2005, p. 335-338.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ferromagnetism of Mn/Ge multilayers grown by molecular beam epitaxy
AU - Lee, J. J.
AU - Medvedeva, J. E.
AU - Song, J. H.
AU - Cui, Y.
AU - Freeman, Arthur J
AU - Ketterson, J. B.
PY - 2005
Y1 - 2005
N2 - We report on novel ferromagnetic Mn/Ge multilayers for spintronics applications investigated both experimentally and theoretically. Two Mn/Ge multilayers are grown on GaAs (001) substrates by molecular beam epitaxy. The period of each multilayer consists of an Mn layer of varying thickness (0.6 and 5 Å) and a 10 Å thick Ge spacer layer. From temperaturedependent magnetization and hysteresis loop measurements, the Mn (0.6 Å)/Ge (10 Å) multilayer showed very weak ferromagnetic ordering, which is persistent up to 260 K, whereas the Mn (5 Å)/Ge (10 Å) multilayer exhibited strong ferromagnetism up to 305 K. The coercive field of the Mn (5 Å)/Ge (10 Å) multilayer was 277 Oe at 200 K. Density functional electronic band structure calculations on a number of Mn/Ge (001) multilayers determined them to be ferromagnetic, and estimates of their critical temperatures are reported.
AB - We report on novel ferromagnetic Mn/Ge multilayers for spintronics applications investigated both experimentally and theoretically. Two Mn/Ge multilayers are grown on GaAs (001) substrates by molecular beam epitaxy. The period of each multilayer consists of an Mn layer of varying thickness (0.6 and 5 Å) and a 10 Å thick Ge spacer layer. From temperaturedependent magnetization and hysteresis loop measurements, the Mn (0.6 Å)/Ge (10 Å) multilayer showed very weak ferromagnetic ordering, which is persistent up to 260 K, whereas the Mn (5 Å)/Ge (10 Å) multilayer exhibited strong ferromagnetism up to 305 K. The coercive field of the Mn (5 Å)/Ge (10 Å) multilayer was 277 Oe at 200 K. Density functional electronic band structure calculations on a number of Mn/Ge (001) multilayers determined them to be ferromagnetic, and estimates of their critical temperatures are reported.
KW - Ferromagnetism
KW - MBE
KW - Mn/Ge multilayers
UR - http://www.scopus.com/inward/record.url?scp=33645007979&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645007979&partnerID=8YFLogxK
U2 - 10.1007/S10948-005-0005-2
DO - 10.1007/S10948-005-0005-2
M3 - Article
AN - SCOPUS:33645007979
VL - 18
SP - 335
EP - 338
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
IS - 3
ER -