Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Ü. Parts"'
Publikováno v:
Journal of Low Temperature Physics. 107:93-164
We report on the first comprehensive measurements of critical superflow velocities in3He-B which allow different mechanisms of vortex formation to be identified. As a function of temperatureT and pressureP, we measure the critical angular velocity Ω
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::412063ac3133e7d476a7be1916eb7f4a
https://doi.org/10.1007/bf02396838
https://doi.org/10.1007/bf02396838
Publikováno v:
Journal of Low Temperature Physics. 103:331-343
NMR spectrometry can be used to identify different topological objects in the order parameter field of rotating superfluid3He-A. We list their signatures in the cw NMR absorption line shape. Quantized vortex lines, domain walls, and their combination
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bb404f0972a1533d067416d7c94b4af
https://doi.org/10.1007/bf00754793
https://doi.org/10.1007/bf00754793
Autor:
Ü. Parts, Matti Krusius, Grigory Volovik, J. M. Karimäki, V. M. H. Ruutu, Erkki Thuneberg, J.H. Koivuniemi
Publikováno v:
Physical Review Letters. 75:3320-3323
Four alternative but topologically different structures of vorticity exist in rotating ${}^{3}\mathrm{H}\mathrm{e}\ensuremath{-}A$. As a function of magnetic field ( $H$) and rotation velocity $(\ensuremath{\Omega})$, we identify with NMR the type of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::222d266179e50fa9e9835c8aed8ffdd8
https://doi.org/10.1103/physrevlett.75.3320
https://doi.org/10.1103/physrevlett.75.3320
Autor:
Vladimir V. Dmitriev, Yu. M. Bunkov, J. S. Korhonen, J.H. Koivuniemi, P. I. Soininen, Matti Krusius, Ü. Parts, Mikael Fogelström, Olli V. Lounasmaa, Grigory Volovik, Y. Kondo, M. Huebner, V. M. H. Ruutu, N. B. Kopnin
Publikováno v:
Europhysics Letters (EPL). 31:449-454
Nucleation of vortices in units of one quantum has been observed with c.w. NMR in a rotating cylinder filled with 3He-B. During acceleration a new vortex is created each time the counterflow velocity at the perimeter reaches a critical value vc(T, p)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::237bcf7bd1c7ddd40cf376a9fb1c858b
https://doi.org/10.1209/0295-5075/31/8/005
https://doi.org/10.1209/0295-5075/31/8/005
Autor:
J.H. Koivuniemi, J. M. Karimäki, V. M. H. Ruutu, Matti Krusius, Erkki Thuneberg, Ü. Parts, M.T. Heinila, Grigory Volovik
Publikováno v:
Physical Review Letters. 72:3839-3842
A new state of rotating superfluid $^{3}\mathit{A}$ has been found. Instead of quantized vortex lines, it consists of a continuous vortex sheet. The sheet has as a backbone a topologically stable domain wall called soliton, to which the vorticity is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f5bff701938d39f587bdc05e80e94bd
https://doi.org/10.1103/physrevlett.72.3839
https://doi.org/10.1103/physrevlett.72.3839
Publikováno v:
Physica B: Condensed Matter. 197:376-389
Quantized vortices, when formed in rotating 3 He, can effectively be studied by NMR. Vortices of different structure have been identified, depending on the superfluid phase and the external conditions. Here we discuss what happens when the first-orde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3615ffa95cc3f95425af38ee3f466ab
https://doi.org/10.1016/0921-4526(94)90235-6
https://doi.org/10.1016/0921-4526(94)90235-6
Publikováno v:
Physical Review Letters. 71:2951-2954
Using NMR techniques we monitor the structure and number of vortices in a cylindrical container, rotating at constant angular velocity Ω, before and after the passage of the A-B interface. The initial A phase contains the equilibrium number of vorti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88b59ef3e95a12324ec902c767d7b9a5
https://doi.org/10.1103/physrevlett.71.2951
https://doi.org/10.1103/physrevlett.71.2951
Autor:
Yu. M. Bunkov, Yu. M. Mukharskiy, Vladimir V. Dmitriev, Matti Krusius, J. S. Korhonen, Y. Kondo, Ü. Parts, Erkki Thuneberg
Publikováno v:
Physical Review B. 46:13983-13990
In transverse NMR at high rf excitation, it is possible to separate a [sup 3]He-[ital B] sample into two magnetic domains. In one domain the spins are precessing coherently with a large tilting angle in relation to the polarizing magnetic field while
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5dd30abd4eaeb2dd880163b46dc86db
https://doi.org/10.1103/physrevb.46.13983
https://doi.org/10.1103/physrevb.46.13983
Publikováno v:
Physica B: Condensed Matter. 178:90-101
In rotating 3He-B the critical flow velocity for the nucleation of singular vortex lines is high and allows the existence of different rotating states: vortex-free counterflow, the equilibrium vortex state, and metastable states with a well-defined v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37b47fddf6fe6e3d865fe12913df615d
https://doi.org/10.1016/0921-4526(92)90183-s
https://doi.org/10.1016/0921-4526(92)90183-s
Autor:
C. Feller, U. Partsch
Publikováno v:
Journal of Sensors and Sensor Systems, Vol 10, Pp 83-91 (2021)
Ion-selective electrodes (ISEs) have been proven particularly useful in water analysis. They are usually used as single-rod measuring chains in different designs, which are manufactured using precision mechanical manufacturing and assembling technolo
Externí odkaz:
https://doaj.org/article/3be980018b534627aaebb20aa0b66d68