Abstract
We used Brillouin light scattering to probe and quantify the effect Al overlayers have on the magnetic properties of epitaxial Fe layers grown on GaAs(001). In addition, we correlate the magnetic properties with structural properties obtained using reflection high-energy electron diffraction. We unexpectedly find that an epitaxial Al overlayer induces a significant volume component to the uniaxial magnetic anisotropy energy in 1.1-3.0 nm Fe layers of magnitude (2.5±0.2) × 105 erg cm3. Our data indicate that the origin of this volume component resides in the presence of an anisotropic strain and relaxation induced in the Fe layer. However, for thinner Fe layers, the overlayer suppresses the uniaxial magnetic anisotropy of Fe layers. We also find that the Al overlayer has no effect on the cubic magnetic anisotropy energy and effective magnetization as our measured values of these constants are consistent and in good agreement with previous reports of Fe layers with Au and Cu overlayers and those without an overlayer.
| Original language | English (US) |
|---|---|
| Article number | 094417 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 73 |
| Issue number | 9 |
| DOIs | |
| State | Published - 2006 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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Overlayer-induced magnetic uniaxial anisotropy in nanoscale epitaxial Fe. / Shaw, Justin M.; Lee, Sukmock; Falco, Charles M.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 73, No. 9, 094417, 2006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Overlayer-induced magnetic uniaxial anisotropy in nanoscale epitaxial Fe
AU - Shaw, Justin M.
AU - Lee, Sukmock
AU - Falco, Charles M
PY - 2006
Y1 - 2006
N2 - We used Brillouin light scattering to probe and quantify the effect Al overlayers have on the magnetic properties of epitaxial Fe layers grown on GaAs(001). In addition, we correlate the magnetic properties with structural properties obtained using reflection high-energy electron diffraction. We unexpectedly find that an epitaxial Al overlayer induces a significant volume component to the uniaxial magnetic anisotropy energy in 1.1-3.0 nm Fe layers of magnitude (2.5±0.2) × 105 erg cm3. Our data indicate that the origin of this volume component resides in the presence of an anisotropic strain and relaxation induced in the Fe layer. However, for thinner Fe layers, the overlayer suppresses the uniaxial magnetic anisotropy of Fe layers. We also find that the Al overlayer has no effect on the cubic magnetic anisotropy energy and effective magnetization as our measured values of these constants are consistent and in good agreement with previous reports of Fe layers with Au and Cu overlayers and those without an overlayer.
AB - We used Brillouin light scattering to probe and quantify the effect Al overlayers have on the magnetic properties of epitaxial Fe layers grown on GaAs(001). In addition, we correlate the magnetic properties with structural properties obtained using reflection high-energy electron diffraction. We unexpectedly find that an epitaxial Al overlayer induces a significant volume component to the uniaxial magnetic anisotropy energy in 1.1-3.0 nm Fe layers of magnitude (2.5±0.2) × 105 erg cm3. Our data indicate that the origin of this volume component resides in the presence of an anisotropic strain and relaxation induced in the Fe layer. However, for thinner Fe layers, the overlayer suppresses the uniaxial magnetic anisotropy of Fe layers. We also find that the Al overlayer has no effect on the cubic magnetic anisotropy energy and effective magnetization as our measured values of these constants are consistent and in good agreement with previous reports of Fe layers with Au and Cu overlayers and those without an overlayer.
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U2 - 10.1103/PhysRevB.73.094417
DO - 10.1103/PhysRevB.73.094417
M3 - Article
AN - SCOPUS:33645075476
VL - 73
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 9
M1 - 094417
ER -