| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000361839 |
| ISSN: | 0103-9733 |
| Authors: | Valladares, L. de los Santos1 Bustamante Domínguez, A2 Aguiar, J. Albino1 Reeve, R.M3 Mitrelias, T3 Langford, R.M3 Azuma, Y4 Barnes, C.H.W3 Majima, Y5 |
| Institutions: | 1Universidade Federal de Pernambuco, Departamento de Física, Recife, Pernambuco. Brasil 2Universidad Nacional Mayor de San Marcos, Facultad de Ciencias Físicas, Lima. Perú 3University of Cambridge, Department of Physics, Cambridge, Cambridgeshire. Reino Unido 4Tokyo Institute of Technology, Materials and Structures Laboratory, Yokohama, Kanagawa. Japón 5Japan Science and Technology Agency, Yokohama, Kanagawa. Japón |
| Year: | 2013 |
| Season: | Ago |
| Volumen: | 43 |
| Number: | 4 |
| Pages: | 209-213 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | In this work, we report the mechanical reorientation of thiolated ferromagnetic microspheres bridging a pair of gold electrodes under an external magnetic field. When an external magnetic field (7 kG) is applied during the measurement of the current–voltage characteristics of a carboxyl ferromagnetic microsphere (4 μm diameter) attached to two gold electrodes by self-assembled monolayers (SAMs) of octane dithiol (C8H18S2), the current signal is distorted. Rather than due to magnetoresistance, this effect is caused by a mechanical reorientation of the ferromagnetic sphere, which alters the number of SAMs between the sphere and the electrodes and therefore affects conduction. To study the physical reorientation of the ferromagnetic particles, we measure their hysteresis loops while suspended in a liquid solution |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Micropartículas magnéticas, Corriente eléctrica, Histéresis magnética |
| Keyword: | Physics and astronomy, Condensed matter physics, Magnetic microparticles, Electric current, Magnetic hysteresis |
| Full text: | Texto completo (Ver HTML) |
