β-NMR Study of a buried Mn δ-doped layer in a silicon host

13th International Conference on Muon Spin Rotation, Relaxation and Resonance

Cortie, D.^1,2 ; Buck, T.^2 ; McFadden, R.M.L.^3 ; Xiao, J.^3 ; Levy, C.D.P.^4 ; Dehn, M.^5 ; Pearson, M.^4 ; Morris, G.D.^4 ; Dunsiger, S.R.^5 ; Kiefl, R.F.^2 ; Rueß, F.J.^6 ; Fuhrer, A.^6 ; Macfarlane, W.A.^1,3

Quantum Matter Institute, University of British Columbia, Vancouver

BC

V6T 1Z4, Canada^1

Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver

BC

V6T 1Z1, Canada^2

Chemistry Department, University of British Columbia, Vancouver

BC

V6T 1Z1, Canada^3

TRIUMF, 4004 Wesbrook Mall, Vancouver

BC

V6T 2A3, Canada^4

Physik-Department, Technische Universität München, James-Franck-Straße 1, Garching bei München

85748, Germany^5

IBM Research-Zurich, Säumerstrasse 4, Rüschlikon

8803, Switzerland^6

关键词: Delta-doped layers;    Depth dependents;    Lorentzian shapes;    Low temperature growth;    Low temperatures;    Resonance shift;    Temperature range;    Weak interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/551/1/012023/pdf
DOI  :  10.1088/1742-6596/551/1/012023

来源: IOP

【 摘 要 】

Low temperature growth methods were used to encapsulate a buried Mn δ-doping layer into a silicon host. A β-NMR investigation was performed of the magnetic properties in the temperature range 10-300 K using spin-polarized8Li+. A depth-dependent broadening and shift of the NMR resonance was detected that is consistent with internal fields distributed at depths of 10-30 nm beneath the surface. At low temperatures, a negative relative shift occurred and the resonance was significantly broadened. At 300 K the line-shape could be described by a single Gaussian line, however, at 10 K the line is best approximated by a two component Lorentzian shape consisting of a broad and narrow component as anticipated for a diluted magnetic alloy. The overall magnitude of the resonance shift at both temperatures is small suggesting a weak interaction between the8Li+and the magnetic Mn environment.