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of 82
pro vyhledávání: '"Groll, N."'
Point contact tunneling (PCT) spectroscopy measurements are reported over wide areas of cm-sized cut outs from niobium superconducting RF cavities. A comparison is made between a high-quality, conventionally processed (CP) cavity with a high field Q
Externí odkaz:
http://arxiv.org/abs/1805.06359
Autor:
Dhakal, P., Ciovati, G., Myneni, G. R., Gray, K. E., Groll, N., Maheshwari, P., McRae, D. M., Pike, R., Proslier, T., Stevie, F., Walsh, R. P., Yang, Q., Zasadzinzki, J.
Large-grain Nb has become a viable alternative to fine-grain Nb for the fabrication of superconducting radio-frequency cavities. In this contribution we report the results from a heat treatment study of a large-grain 1.5 GHz single-cell cavity made o
Externí odkaz:
http://arxiv.org/abs/1210.6875
Publikováno v:
Journal of Physics: Conference Series 324, 012008 (2011)
We report on multiple photon monochromatic quantum oscillations (Rabi oscillations) observed by pulsed EPR (Electron Paramagnetic Resonance) of Mn$^{2+}$ (S=5/2) impurities in MgO. We find that when the microwave magnetic field is similar or large th
Externí odkaz:
http://arxiv.org/abs/1110.4813
Publikováno v:
Phys. Rev. B, vol 84, 134433 (2011)
We report on multi-photon Rabi oscillations and controlled tuning of a multi-level system at room temperature (S=5/2 for Mn2+:MgO) in and out of a quasi-harmonic level configuration. The anisotropy is much smaller than the Zeeman splittings, such as
Externí odkaz:
http://arxiv.org/abs/1106.3365
Publikováno v:
Phys. Rev. B, vol 82, issue 2, 024413 (2010)
We study the energy level structure of the Tavis-Cumming model applied to an ensemble of independent magnetic spins $s=1/2$ coupled to a variable number of photons. Rabi splittings are calculated and their distribution is analyzed as a functin of pho
Externí odkaz:
http://arxiv.org/abs/1004.3605
Publikováno v:
published 11 January 2010 in Physical Review B Rapid Comm. 81, 020504(R) (2010)
We report observation of the nonlinear Meissner effect (NLME) in Nb films by measuring the resonance frequency of a planar superconducting cavity as a function of the magnitude and the orientation of a parallel magnetic field. Use of low power rf pro
Externí odkaz:
http://arxiv.org/abs/0908.4097
Publikováno v:
J. Appl. Phys., 106 (4), 046106 (2009)
On-chip Electron Spin Resonance (ESR) of magnetic molecules requires the ability to precisely position nanosized samples in antinodes of the electro-magnetic field for maximal magnetic interaction. A method is developed to entrap micro-crystals conta
Externí odkaz:
http://arxiv.org/abs/0908.3038
Publikováno v:
Phys. Rev. Lett. 102, 050501 (2009)
Large spin Mn2+ ions (S=5/2) diluted in a non-magnetic MgO matrix of high crystalline symmetry are used to realize a six level system that can be operated by means of multi-photon coherent Rabi oscillations. This spin system has a very small anisotro
Externí odkaz:
http://arxiv.org/abs/0812.4534
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