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Hyperfine magnetic fields in Fe/Ag magnetic multilayers probed with low energy spin polarized ⁸Li Keeler, Todd Allan
Abstract
This thesis is a presentation of experiments examining the induced hyperfine magnetism in the nonmagnetic layers of two thin film magnetic multilayers, Au(40Å) / Ag(200Å) / Fe(140Å) and Au(40Å) / Ag(800Å) / Fe(20Å) grown on GaAs(001) single crystal substrates. The main technique used in this study was beta-detected nuclear magnetic resonance (βNMR) conducted at TRIUMF laboratories in Vancouver, British Columbia. βNMR makes NMR measurements on radioactive ⁸Li⁺ (τ=1.21 sec) nuclei that are implanted directly into the sample. Resonant βNMR experiments showed strong induced magnetism in the non-magnetic Ag layer due the magnetic Fe. Comparison of a theoretical model to experimental results on the Au(40Å) / Ag(200Å) / Fe(140Å) sample suggest that the induced hyperfine magnetism decays with distance into the Ag layer from the magnetic/nonmagnetic interface like x⁻¹·⁸⁴ from a maximum of ~0.3 T at the magnetic/nonmagnetic interface.
Item Metadata
| Title |
Hyperfine magnetic fields in Fe/Ag magnetic multilayers probed with low energy spin polarized ⁸Li
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| Creator | |
| Publisher |
University of British Columbia
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| Date Issued |
2006
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| Description |
This thesis is a presentation of experiments examining the induced hyperfine magnetism in the nonmagnetic layers of two thin film magnetic multilayers, Au(40Å) / Ag(200Å) / Fe(140Å) and Au(40Å) / Ag(800Å) / Fe(20Å) grown on GaAs(001) single crystal substrates. The main technique used in this study was beta-detected nuclear magnetic resonance (βNMR) conducted at TRIUMF laboratories in Vancouver, British Columbia. βNMR makes NMR measurements on radioactive ⁸Li⁺ (τ=1.21 sec) nuclei that are implanted directly into the sample. Resonant βNMR experiments showed strong induced magnetism in the non-magnetic Ag layer due the magnetic Fe. Comparison of a theoretical model to experimental results on the Au(40Å) / Ag(200Å) / Fe(140Å) sample suggest that the induced hyperfine magnetism decays with distance into the Ag layer from the magnetic/nonmagnetic interface like x⁻¹·⁸⁴ from a maximum of ~0.3 T at the magnetic/nonmagnetic interface.
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| Genre | |
| Type | |
| Language |
eng
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| Date Available |
2010-01-16
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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| DOI |
10.14288/1.0092912
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| URI | |
| Degree (Theses) | |
| Program (Theses) | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
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| Graduation Date |
2006-05
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| Campus | |
| Scholarly Level |
Graduate
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| Aggregated Source Repository |
DSpace
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.