| Zugriffsnummer | 35376 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Magnetization reversal of an individual exchange-biased permalloy nanotube |
| Autor(in); Institution |
Buchter, A.; University of Basel, Department of Physics, Basel, SWITZERLAND
Wölbing, R.; Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Tübingen, GERMANY
Wyss, M.; University of Basel, Department of Physics, Basel, SWITZERLAND
Kieler, Oliver; 2.4, Quantenelektronik, PTB-Braunschweig
Weimann, Thomas; 2.4, Quantenelektronik, PTB-Braunschweig
Kohlmann, Johannes; 2.4, Quantenelektronik, PTB-Braunschweig
Zorin, Alexander B.; 2.4, Quantenelektronik, PTB-Braunschweig
Rüffer, D.; Ecole Polytechnique Fédérale de Lausanne, Laboratoire des Matériaux Semiconducteurs, Institut des Matériaux, Lausanne, SWITZERLAND
Matteini, F.; Laboratoire des matériaux semiconducteurs LMSC de l'institut des matériaux IMX et Section de science et génie des matériaux SMX, Faculté des sciences et techniques de l'ingénieur STI, Ecole polytechnique fédérale de Lausanne EPFL, Lausanne, SWITZERLAND
Tütüncüoglu, G.; Laboratoire des matériaux semiconducteurs LMSC de l'institut des matériaux IMX et Section de science et génie des matériaux SMX, Faculté des sciences et techniques de l'ingénieur STI, Ecole polytechnique fédérale de Lausanne EPFL, Lausanne, SWITZERLAND
Heimbach, F.; Technische Universität München, Lehrstuhl für Physik funktionaler Schichtsysteme, Physik Department E10, Garching, GERMANY
Kleibert, A.; Swiss Light Source, Paul Scherrer Institut, Villigen PSI, SWITZERLAND
Fontcuberta i Morral, A.; Ecole Polytechnique Fédérale de Lausanne, Laboratoire des Matériaux Semiconducteurs, Institut des Matériaux, Lausanne, SWITZERLAND
Grundler, D.; Technische Universität München, Lehrstuhl für Physik funktionaler Schichtsysteme, Physik Department E10, Garching, GERMANY; Laboratory of Nanoscale Magnetic Materials and Magnonics LMGN, Institute of Materials IMX, Faculté des sciences et techniques de l'ingénieur STI, Ecole polytechnique fédérale de Lausanne EPFL, Lausanne, SWITZERLAND
Kleiner, R.; Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Tübingen, GERMANY
Kölle, D.; Universität Tübingen, Physikalisches Institut, Experimentalphysik II and Center for Collective Quantum Phenomena in LISA+, Tübingen, GERMANY
Poggio, M.; University of Basel, Department of Physics, Basel, SWITZERLAND
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| Quelle/Jahr | Physical Review B: 92 (2015), 21, 1 - 7 |
| Artikelnummer | 214432 |
| ISSN | 1098-0121 (PRINT) ; 1095-3795 (ONLINE) |
| DOI | |
| Verlag | Melville, NY: American Physical Society |
| Klassifikationscode | PACS: 75.60.Jk ; PACS: 07.55.Jg ; PACS: 75.75.-c |
| Zusammenfassung | We investigate the magnetization reversal mechanism in an individual permalloy (Py) nanotube (NT) using a hybrid magnetometer consisting of a nanometer-scale SQUID (nanoSQUID) and a cantilever torque sensor. The Py NT is affixed to the tip of a Si cantilever and positioned in order to optimally couple its stray flux into a Nb nanoSQUID. We are thus able to measure both the NT's volume magnetization by dynamic cantilever magnetometry and its stray flux using the nanoSQUID. We observe a training effect and a temperature dependence in the magnetic hysteresis, suggesting an exchange bias. We find a low blocking temperature TB =18±2 K, indicating the presence of a thin antiferromagnetic native oxide, as confirmed by x-ray absorption spectroscopy on similar samples. Furthermore, we measure changes in the shape of the magnetic hysteresis as a function of temperature and increased training. These observations show that the presence of a thin exchange-coupled native oxide modifies the magnetization reversal process at low temperatures. Complementary information obtained via cantilever and nanoSQUID magnetometry allows us to conclude that, in the absence of exchange coupling, this reversal process is nucleated at the NT's ends and propagates along its length as predicted by theory. |
Zitierung
Buchter, A., Wölbing, R., Wyss, M., Kieler, O., Weimann, T., Kohlmann, J., Zorin, A. B., Rüffer, D., Matteini, F., Tütüncüoglu, G., Heimbach, F., Kleibert, A., Fontcuberta i Morral, A., Grundler, D., Kleiner, R., Kölle, D., & Poggio, M. (2015). Magnetization reversal of an individual exchange-biased permalloy nanotube. Physical Review B, 92(21), 1–7. https://doi.org/10.1103/physrevb.92.214432