Abstract
First-principles calculations of the optical conductivities and magneto-optical Kerr effects for bulk and thin films of Co and for CoPtn alloys (n = 1 and 3) and multilayer (n = 3) are carried out using the full potential linearized augmented plane wave method with the local spin density approximation. For fcc bulk Co, we obtain a negligible dependence of the polar Kerr rotation on the direction of magnetization. By contrast, the calculated Kerr spectra of CoPtn are found to be very sensitive to structural changes. For Co(001) and Co(111) ultrathin films, the surface effects cause a redshift for the high-energy peaks in the magneto-optic Kerr effect (MOKE) spectra, mainly due to band narrowing. Except for the free standing Co(001) monolayer, the profile of their MOKE spectra, however, is very close to that of bulk Co.
| Original language | English |
|---|---|
| Pages (from-to) | 9432-9436 |
| Number of pages | 5 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 59 |
| Issue number | 14 |
| Publication status | Published - Apr 1 1999 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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Surface effects and structural dependence of magneto-optical spectra : Ultrathin Co films and CoPtn alloys and multilayers. / Kim, Miyoung; Freeman, Arthur J; Wu, Ruqian.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 59, No. 14, 01.04.1999, p. 9432-9436.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface effects and structural dependence of magneto-optical spectra
T2 - Ultrathin Co films and CoPtn alloys and multilayers
AU - Kim, Miyoung
AU - Freeman, Arthur J
AU - Wu, Ruqian
PY - 1999/4/1
Y1 - 1999/4/1
N2 - First-principles calculations of the optical conductivities and magneto-optical Kerr effects for bulk and thin films of Co and for CoPtn alloys (n = 1 and 3) and multilayer (n = 3) are carried out using the full potential linearized augmented plane wave method with the local spin density approximation. For fcc bulk Co, we obtain a negligible dependence of the polar Kerr rotation on the direction of magnetization. By contrast, the calculated Kerr spectra of CoPtn are found to be very sensitive to structural changes. For Co(001) and Co(111) ultrathin films, the surface effects cause a redshift for the high-energy peaks in the magneto-optic Kerr effect (MOKE) spectra, mainly due to band narrowing. Except for the free standing Co(001) monolayer, the profile of their MOKE spectra, however, is very close to that of bulk Co.
AB - First-principles calculations of the optical conductivities and magneto-optical Kerr effects for bulk and thin films of Co and for CoPtn alloys (n = 1 and 3) and multilayer (n = 3) are carried out using the full potential linearized augmented plane wave method with the local spin density approximation. For fcc bulk Co, we obtain a negligible dependence of the polar Kerr rotation on the direction of magnetization. By contrast, the calculated Kerr spectra of CoPtn are found to be very sensitive to structural changes. For Co(001) and Co(111) ultrathin films, the surface effects cause a redshift for the high-energy peaks in the magneto-optic Kerr effect (MOKE) spectra, mainly due to band narrowing. Except for the free standing Co(001) monolayer, the profile of their MOKE spectra, however, is very close to that of bulk Co.
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M3 - Article
AN - SCOPUS:0000057193
VL - 59
SP - 9432
EP - 9436
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 14
ER -