| Full text | |
| Author(s): |
Leite, D. M. G.
[1]
;
Batagin-Neto, A.
[2]
;
Nunes-Neto, O.
[2]
;
Gomez, J. A.
[3]
;
Graeff, C. F. O.
[4, 2]
Total Authors: 5
|
| Affiliation: | [1] UNIFEI Univ Fed Itajuba, BR-37500903 Itajuba, MG - Brazil
[2] UNESP Univ Estadual Paulista, POSMAT Programa Posgrad Ciencia & Tecnol Mat, BR-17033360 Bauru, SP - Brazil
[3] FFCLRP USP, Dept Fis, BR-14040901 Ribeirao Preto, SP - Brazil
[4] UNESP Univ Estadual Paulista, DF FC, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Journal of Applied Physics; v. 115, n. 3 JAN 21 2014. |
| Web of Science Citations: | 0 |
| Abstract | |
The physics of electrically detected magnetic resonance (EDMR) quadrature spectra is investigated. An equivalent circuit model is proposed in order to retrieve crucial information in a variety of different situations. This model allows the discrimination and determination of spectroscopic parameters associated to distinct resonant spin lines responsible for the total signal. The model considers not just the electrical response of the sample but also features of the measuring circuit and their influence on the resulting spectral lines. As a consequence, from our model, it is possible to separate different regimes, which depend basically on the modulation frequency and the RC constant of the circuit. In what is called the high frequency regime, it is shown that the sign of the signal can be determined. Recent EDMR spectra from Alq(3) based organic light emitting diodes, as well as from a-Si: H reported in the literature, were successfully fitted by the model. Accurate values of g-factor and linewidth of the resonant lines were obtained. (C) 2014 AIP Publishing LLC. (AU) | |
| FAPESP's process: | 11/21830-6 - Study of Spin Dependent Transport Processes in Organic Solar Cells. |
| Grantee: | Oswaldo Nunes Neto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 08/57872-1 - National Institute for Materials Science in Nanotechnology |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/03116-7 - Simulation of electronic and optical properties of organic materials |
| Grantee: | Augusto Batagin Neto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |