Zobrazeno 1 - 10
of 53
pro vyhledávání: '"M. Človečko"'
Publikováno v:
Journal of Low Temperature Physics
We present the measurements of a parametrically excited quartz tuning fork in vacuum at very low temperatures ( $$\sim 20$$ mK) and magnetic field of 1.5 Tesla. We show that if a quartz tuning fork is exposed to a high static magnetic field, the moti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3c22667af78ed039a00cfa092729502
https://doi.org/10.1007/s10909-020-02420-7
https://doi.org/10.1007/s10909-020-02420-7
Autor:
P. Skyba, M. Človečko
Publikováno v:
Journal of Low Temperature Physics
We present the properties of the standard, commercial 100 kHz quartz tuning forks at very low temperatures and high magnetic fields up to 8 Tesla. We show that the resonance frequency of the tuning forks depends weakly on the strength of magnetic fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66f2cbce84efa9d22a687f6cf526d4f1
https://doi.org/10.1007/s10909-019-02273-9
https://doi.org/10.1007/s10909-019-02273-9
Publikováno v:
Physical review letters. 123(16)
We report on the theoretical model and experimental results of the experiment made in a limit of absolute zero temperature (∼600 μK) studying the spin wave analog of black- and white-hole horizons using spin (magnonic) superfluidity in superfluid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8442b0bf88cf52aefacf6190a0d98037
https://pubmed.ncbi.nlm.nih.gov/31702334
https://pubmed.ncbi.nlm.nih.gov/31702334
Autor:
Mauro Giovannini, Slavomír Gabáni, J. G. Sereni, Gabriel Pristáš, F. Vavrek, P. Skyba, I. Čurlík, M. Človečko, Marian Reiffers, A. Džubinská, F. Gastaldo
Publikováno v:
Physical Review B
We report on synthesis, crystal structure, magnetic, thermodynamic, and transport properties of the compound ${\mathrm{YbPd}}_{2}\mathrm{In}$, crystallizing as a Heusler structure type. A trivalent state of the rare earth was determined by fitting th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247b3e4cafb0cc39425f41bedd025c7a
http://hdl.handle.net/11567/985878
http://hdl.handle.net/11567/985878
Publikováno v:
Physical Review B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=r3c4b2081b22::e0c0c9638cdd264bc825ca3aa9583fde
Publikováno v:
Journal of Low Temperature Physics. 187:573-579
The results of a newly developed pulse-demodulation (P-D) technique introduced to determine the resonant characteristics of a high Q value quartz tuning forks in vacuum and millikelvin temperature range are presented. Applying P-D technique to a stan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b98c0c0644315d60fbadd553ce4cee55
https://doi.org/10.1007/s10909-016-1696-4
https://doi.org/10.1007/s10909-016-1696-4
The dynamics of micro-resonators (or any mechanical resonators) can be studied by two complementary methods allowing the measurements in two different domains: (i) in the frequency domain - by the frequency sweeps using cw-excitation, and (ii) in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c91ba84191aa233fa0739a4ee6efa68a
Autor:
Martin Jackson, D. Schmoranzer, M. Človečko, Andrew Woods, Ladislav Skrbek, M.W. Poole, Viktor Tsepelin
Publikováno v:
Physical Review B. 94
We report recent investigations into the transition to turbulence in superfluid $^4$He, realized experimentally by measuring the drag forces acting on two custom-made quartz tuning forks with fundamental resonances at 6.5 kHz and 55.5 kHz, in the tem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8032f967daf64728380755ad63697f0d
https://doi.org/10.1103/physrevb.94.214503
https://doi.org/10.1103/physrevb.94.214503
Publikováno v:
Journal of Low Temperature Physics. 175:449-455
We present a method of preparation and preliminary vacuum measurements conducted at ∼20 mK of a new type of micro-resonator based on Sn-whiskers. Sn-whiskers have ∼1 μm radius and their length can be ∼1–2 mm. As added benefit, the Sn-whisker
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e38cd8dd153742855a50ef90e7372d11
https://doi.org/10.1007/s10909-013-0936-0
https://doi.org/10.1007/s10909-013-0936-0
Autor:
Emil Polturak, Manu Kumar, D. I. Bradley, Peter V. E. McClintock, A. J. Woods, Igor Todoshchenko, Richard P. Haley, Viktor Tsepelin, George R. Pickett, A. M. Guénault, Shaun N. Fisher, M.W. Poole, E. A. Guise, Oleg Kolosov, S. L. Ahlstrom, M. Človečko
Publikováno v:
Journal of Low Temperature Physics. 175:140-146
We present the first measurements of the response of a mechanical oscillator in solid 4He. We use a lithium niobate tuning fork operating in its fundamental resonance mode at a frequency of around 30 kHz. Measurements in solid 4He were performed clos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec4977bf5b23629da171c0ae32c4878d
https://doi.org/10.1007/s10909-013-0930-6
https://doi.org/10.1007/s10909-013-0930-6