| Microstrip resonators for electron paramagnetic resonance experiments. | |
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MedLine Citation:
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PMID: 19655985 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In this article we evaluate the performance of an electron paramagnetic resonance (EPR) setup using a microstrip resonator (MR). The design and characterization of the resonator are described and parameters of importance to EPR and spin manipulation are examined, including cavity quality factor, filling factor, and microwave magnetic field in the sample region. Simulated microwave electric and magnetic field distributions in the resonator are also presented and compared with qualitative measurements of the field distribution obtained by a perturbation technique. Based on EPR experiments carried out with a standard marker at room temperature and a MR resonating at 8.17 GHz, the minimum detectable number of spins was found to be 5 x 10(10) spins/GHz(1/2) despite the low MR unloaded quality factor Q0=60. The functionality of the EPR setup was further evaluated at low temperature, where the spin resonance of Cr dopants present in a GaAs wafer was detected at 2.3 K. The design and characterization of a more versatile MR targeting an improved EPR sensitivity and featuring an integrated biasing circuit for the study of samples that require an electrical contact are also discussed. |
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Authors:
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A C Torrezan; T P Mayer Alegre; G Medeiros-Ribeiro |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Review of scientific instruments Volume: 80 ISSN: 1089-7623 ISO Abbreviation: Rev Sci Instrum Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-08-06 Completed Date: 2009-10-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0405571 Medline TA: Rev Sci Instrum Country: United States |
Other Details:
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Languages: eng Pagination: 075111 Citation Subset: IM |
Affiliation:
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Laboratório Nacional de Luz Síncrotron, Caixa Postal 6192, Campinas, São Paulo 13084-971, Brazil. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arsenicals Computer Simulation Electromagnetic Fields Electron Spin Resonance Spectroscopy / instrumentation*, methods* Equipment Design Gallium Microtechnology / instrumentation* Microwaves Temperature |
| Chemical | |
Reg. No./Substance:
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0/Arsenicals; 1303-00-0/gallium arsenide; 7440-55-3/Gallium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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