Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 49: Superconductivity: Superconducting Electronics I
TT 49.11: Vortrag
Mittwoch, 14. März 2018, 12:30–12:45, H 2053
Advanced nanoSQUIDs based on sub-micron trilayer Nb/HfTi/Nb Josephson junctions — •Julian Linek1, Aaron Koser1, Benedikt Müller1, Katrin Meyer1, Maria José Martínez-Pérez2, Thomas Weimann3, Oliver Kieler3, Reinhold Kleiner1, and Dieter Koelle1 — 1Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Germany — 2Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza and Fundación ARAID, Zaragoza, Spain — 3Fachbereich Quantenelektronik, Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
We report on the development and performance of advanced Nb nanoSQUIDs for magnetization reversal studies on individual magnetic nanoparticles (MNPs). The nanoSQUIDs are based on trilayer high critical current density Nb/HfTi/Nb Josephson junctions. This offers the unique advantage of combining the realization of SQUIDs with very small loop inductance and hence extremely low flux noise, with a superconductor multilayer approach that offers the fabrication of complex devices with significantly increased functionality for various applications. One example is the recently developed 3-axis vector nanoSQUID [1]. Here, we present the performance of improved vector nanoSQUIDs and first attempts to simultaneously detect at 4.2 K in applied magnetic fields up to a few 100 mT all three orthogonal components of the magnetic moment of individual Co MNPs deposited onto our devices by focused electron beam deposition.
M.J. Martínez-Pérez et al., ACS Nano 10, 8308 (2016)