Zobrazeno 1 - 10
of 1 177
pro vyhledávání: '"Koelle D."'
Autor:
García-Pons, D., Pérez-Bailón, J., Méndiz, A., Júlvez, V., Hack, M., Wurster, K., Kleiner, R., Koelle, D., Martínez-Pérez, M. J.
Magnetic nanoparticles play a crucial role in different fields such as biomedicine or information and quantum technologies. These applications require nanoparticles with a single, well-defined energy minimum, free of metastable states, and characteri
Externí odkaz:
http://arxiv.org/abs/2410.14344
Autor:
Linek, J., Wyszynski, M., Müller, B., Korinski, D., Milošević, M. V., Kleiner, R., Koelle, D.
We investigate the coupling factor $\phi_\mu$ that quantifies the magnetic flux $\Phi$ per magnetic moment $\mu$ of a point-like magnetic dipole that couples to a superconducting quantum interference device (SQUID). Representing the dipole by a curre
Externí odkaz:
http://arxiv.org/abs/2307.05724
Using a $30\,\mathrm{keV}$ focused He ion beam (He-FIB) with a wide range of irradiation doses $D=100$ to $1000\,\mathrm{ions/nm}$ we fabricated Josephson and resistive barriers within microbridges of epitaxially grown single crystalline YBCO thin fi
Externí odkaz:
http://arxiv.org/abs/2304.02749
Autor:
Koshelets V.P., Kinev N.V., Ermakov A.B., Rudau F., Wieland R., Koelle D., Kleiner R., Wang H.B.
Publikováno v:
EPJ Web of Conferences, Vol 195, p 05013 (2018)
Externí odkaz:
https://doaj.org/article/25e3c65bc7dd4e4d8298c91aed1a64c1
We introduce an equivalent-circuit element based on the theory of interface pinning in random systems, to analyze the contribution of domain wall motion below the coercive field to the impedance of a ferroelectric, as a function of amplitude $E_0$ an
Externí odkaz:
http://arxiv.org/abs/2008.04786
We report on the fabrication and characterization of nanopatterned dc SQUIDs with grain boundary Josephson junctions based on heteroepitaxially grown YBa$_2$Cu$_3$O$_7$ (YBCO)/ SiTrO$_3$ (STO) superlattices on STO bicrystal substrates. Nanopatterning
Externí odkaz:
http://arxiv.org/abs/2007.11046
Autor:
Galin, M. A., Rudau, F., Borodianskyi, E. A., Kurin, V. V., Koelle, D., Kleiner, R., Krasnov, V. M., Klushin, A. M.
Publikováno v:
Phys. Rev. Applied 14, 024051 (2020)
Phase-locking of oscillators leads to superradiant amplification of the emission power. This is particularly important for development of THz sources, which suffer from low emission efficacy. In this work we study large Josephson junction arrays cont
Externí odkaz:
http://arxiv.org/abs/2004.06623
Autor:
Buckenmaier, K., Scheffler, K., Plaumann, M., Fehling, P., Bernarding, J., Rudolph, M., Back, C., Koelle, D., Kleiner, R., Hövener, J. -B., Pravdivtsev, A. N.
We present a method for the simultaneous observation of heteronuclear multi-quantum coherences (up to the 3rd order), which give an additional degree of freedom for ultralow magnetic field (ULF) MR experiments, where the chemical shift is negligible.
Externí odkaz:
http://arxiv.org/abs/1905.02485
Autor:
Müller, B., Karrer, M., Limberger, F., Becker, M., Schröppel, B., Burkhardt, C. J., Kleiner, R., Goldobin, E., Koelle, D.
Publikováno v:
Phys. Rev. Applied 11, 044082 (2019)
By scanning with a $30\, \mathrm{keV}$ focused He ion beam (He-FIB) across YBa$_2$Cu$_3$O$_7$ (YBCO) thin film microbridges, we create Josephson barriers with critical current density $j_\mathrm{c}$ adjustable by irradiation dose $D$. The dependence
Externí odkaz:
http://arxiv.org/abs/1901.08039
Publikováno v:
Sensors 18, 3790 (2018)
We report on direct, real-space imaging of the stray magnetic field above a micro-scale disc of a thin film of the high-temperature superconductor YBa$_2$Cu$_3$O$_{7-\delta}$ (YBCO) using scanning single spin magnetometry. Our experiments yield a dir
Externí odkaz:
http://arxiv.org/abs/1807.07584