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  1. No Access

    Article

    NMR Spectroscopy of the Double-Quantum Vortex in Superfluid 3He-A

    The double-quantum vortex line with continuous (singularity-free) structure is the most common linear defect in rotating 3He-A. Its well-known experimental signature is a frequency-shifted satellite peak in the N...

    V. B. Eltsov, R. Blaauwgeers, M. Krusius… in Journal of Low Temperature Physics (2001)

  2. No Access

    Article

    NMR Line Shape of Rotating 3He-B at Large Counterflow Velocity

    We have investigated the NMR line shapes of superfluid 3He-B in a rotating cylinder. In the vortex-free state at sufficiently large angular velocity of rotation, Ω≳1 rad/s, the main feature of the absorption spec...

    J. Kopu, R. Schanen, R. Blaauwgeers, V. B. Eltsov… in Journal of Low Temperature Physics (2000)

  3. No Access

    Article

    Double-quantum vortex in superfluid 3He-A

    Linear defects are generic in continuous media1. In quantum systems they appear as topological line defects which are associated with a circulating persistent current. In relativistic quantum field theories they ...

    R. Blaauwgeers, V. B. Eltsov, M. Krusius, J. J. Ruohio, R. Schanen, G. E. Volovik in Nature (2000)

  4. No Access

    Article

    New Modes of Stable Spin Precession in Superfluid 3He-B

    The cw NMR response of 3 He-B is investigated in large rf excitation fields, which exceed in magnitude the equivalent of the spin-orbit coupling. New states of sta...

    V. B. Eltsov, V. V. Dmitriev, M. Krusius… in Journal of Low Temperature Physics (1998)

  5. No Access

    Article

    Optimization of high-Q low frequency NMR measurement

    In low temperature applications high-Q resonance circuits can be constructed for low frequencies. With a superconducting coil a Q∼104 is obtainable if it is connected directly to a preamplifier at low temperature...

    Y. Kondo, J. H. Koivuniemi, J. J. Ruohio, V. M. Ruutu… in Czechoslovak Journal of Physics (1996)

  6. No Access

    Article

    Annihilation of quantized vortex lines in rotating3He-A

    The maximum number of vortex lines at a given angular velocity Ω is obtained during deceleration when vortices annihilate at the wall of the container. The width of the vortex-free region in the decelerated st...

    V. M. Ruutu, J. J. Ruohio, M. Krusius, B. Plaçais… in Czechoslovak Journal of Physics (1996)

  7. No Access

    Article

    Vortex arrays of coexisting singly and doubly quantized vortex lines in3He-A

    In superfluid3He-A singly and doubly quantized vortex lines can coexist in a rotating container. We measure with NMR techniques the radial distribution of the two vortex types in an array of vortex lines. The rad...

    Ü. Parts, V. V. Avilov, J. H. Koivuniemi, M. Krusius… in Czechoslovak Journal of Physics (1996)