Abstract
The anomalous Hall coefficient (Rs) and longitudinal resistivity (ρxx) scaling relationship (Rs = cρ xxn) for a series of annealed Ga1-xMn xAs epilayers (x ≈ 0.055) are investigated. As-grown samples exhibit a scaling parameter n ∼ 1 and samples annealing near the optimal annealing temperature, n ∼ 2. For annealing temperatures far above the optimum they observe scaling with n > 3, which is similar to the behavior of certain inhomogeneous systems. Optical spectroscopy measurements also reveal an enhancement of the absorption coefficient in these samples for photons of energy around 1 eV. These atypical behaviors are characteristic of spherical resonance from metallic inclusions.
Original language | English |
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Article number | 102503 |
Journal | Applied Physics Letters |
Volume | 89 |
Issue number | 10 |
DOIs | |
State | Published - 2006 |
Bibliographical note
Funding Information:This work was supported by KOSEF through CSCMR. Two of the authors (Y.D.P. and K.H.K.) acknowledge partial support from the City of Seoul R&BD Program. Another two authors (S.S.A.S. and T.W.N.) acknowledge support from MOST through CRI.
Funding
This work was supported by KOSEF through CSCMR. Two of the authors (Y.D.P. and K.H.K.) acknowledge partial support from the City of Seoul R&BD Program. Another two authors (S.S.A.S. and T.W.N.) acknowledge support from MOST through CRI.
Funders | Funder number |
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City of Seoul R&BD | |
Ministry of Science and Technology | |
Korea Science and Engineering Foundation |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)