Dynamics of Magnetically Induced Superflow in Spin-Polarized 3He A1

Masutomi, R.; Kimura, K.; Kobayashi, S.; Yamaguchi, A.; Ishimoto, H.; Kojima, H.
September 2006
AIP Conference Proceedings;2006, Vol. 850 Issue 1, p85
Conference Proceeding
The spin relaxation time (τ) in superfluid 3He A1 phase is measured by observing the magnetic fountain pressure induced across a superleak. Preliminary data are reported on the dependence of τ on applied magnetic field (H), pressure and 4He coverage. When 0.5 < H <1 tesla, τ increases linearly with H in accordance with Hammel-Richardson model. However, τ varies little with field when 2 < H < 8 tesla. As pressure is decreased, τ increases. When the interior wall surfaces (including those of heat exchanger) are covered with five layers of 4He, τ does not change significantly. Conflicting observations show that the driven spin flow phenomena are not well understood. A new oscillatory behavior in magnetic fountain effect at 29 bars is also described. © 2006 American Institute of Physics


Related Articles

  • Spin-Lattice Relaxation in Solid [sup 3]He in Weak Magnetic Fields. Solodovnikov, I. S. // Journal of Experimental & Theoretical Physics;Apr2002, Vol. 94 Issue 4, p770 

    Spin-lattice relaxation times T[sub 1] were measured for solid ³He at temperatures of 0.22 to 0.73 K in a 44-Oe magnetic field. An increase in T[sub 1] at temperatures higher than approximately 0.4 K was related to switching on the vacancy mechanism of atomic mobility in the crystal. At a...

  • Spin–lattice relaxation in the bcc phase of phase-separated [sup 3]He–[sup 4]He solid mixtures. Mikhin, N. P.; Maidanov, V. A.; Polev, A. V. // Low Temperature Physics;Apr2002, Vol. 28 Issue 4, p239 

    The spin-lattice relaxation time in two samples of ³He-[sup 4]He solid mixtures with initial concentrations of 0.5% ³He in [sup 4]He and 0.5% [sup 4]He in ³He is measured by the pulsed NMR method. As a result of phase separation, in both cases two-phase crystals form, having the same...

  • The spin-lattice relaxation in superfluid inclusions formed in the solid helium matrix. Birchenko, A. P.; Vekhov, Ye. O.; Mikhin, N. P.; Rudavskii, E. Ya. // Low Temperature Physics;Sep2013, Vol. 39 Issue 9, p801 

    Processes of spin-lattice relaxation in superfluid inclusions, formed during growth and rapid cooling of helium crystals, are studied by the pulse nuclear magnetic resonance method. Measurements of spin-lattice relaxation times were carried out using the two spin-echoes method. This allows to...

  • Thermomagnetic relaxation in two-phase solid [sup 3]He-[sup 4]He mixtures at ultralow temperatures. Mikhin, N.P.; Omelaenko, N.F. // Low Temperature Physics;Dec98, Vol. 24 Issue 12, p845 

    Investigates the restoration of longitudinal equilibrium magnetization in phase-separated solid helium mixtures using nuclear magnetic resonance (NMR). Dependence of thermomagnetic relaxation on the energy of tipping NMR pulses; Nonmonotonic restoration of magnetization; Assumption on the...

  • Pick-up coil as a tool of measuring spin-lattice relaxation under electron spin resonance condition at high magnetic fields. Strutz, T.; Witowski, A. M.; de Bekker, R. E. M.; Wyder, P. // Applied Physics Letters;8/20/1990, Vol. 57 Issue 8, p831 

    A new method of measuring the spin-lattice relaxation time in solids under far-infrared electron spin resonance condition is presented. The method is illustrated on Cd1-xMnxTe mixed crystals where the magnetization is due to the Mn2+ spins. The temperature dependence of the spin-lattice...

  • 19F nuclear spin relaxation and spin diffusion effects in the single-ion magnet LiYF4:Ho3+. Malkin, B. Z.; Vanyunin, M. V.; Graf, M. J.; Lago, J.; Borsa, F.; Lascialfari, A.; Tkachuk, A. M.; Barbara, B. // European Physical Journal B -- Condensed Matter;Oct2008, Vol. 66 Issue 2, p155 

    Temperature and magnetic field dependences of the 19F nuclear spin-lattice relaxation in a single crystal of LiYF4 doped with holmium are described by an approach based on a detailed consideration of the magnetic dipole-dipole interactions between nuclei and impurity paramagnetic ions and...

  • ESTUDIO POR RMN DE 1H y 2H EN SOLUCIONES PARAMAGNETICAS DE NITRATO DE Eu3+. Díaz Quintanilla, D.; López Tuero, J. L.; Pérez Machado, E.; Zapata Sierra, M.; Cabal Mirabal, C.; Chizhik, V. I. // Nucleus;1991, Issue 10, p3 

    The dependence of the spin-lattice rate (1/T1) of ¹H and ²H nuclei for the 2.1 T magnetic field of the concentration (from 0.1 to 2.75 mol) of Eu3+ paramagnetic ions in the range from 263 K to 373 K is presented. Also the NMRD profield for the frecuency range from 0.1 to 500 MHz is showed.

  • Spin relaxation of radicals in low and zero magnetic field. Fedin, M. V.; Purtov, P. A.; Bagryanskaya, E. G. // Journal of Chemical Physics;1/1/2003, Vol. 118 Issue 1, p192 

    Spin relaxation of radicals in solution in low and zero magnetic field has been studied theoretically. The main relaxation mechanisms in low magnetic field [modulation of anisotropic and isotropic hyperfine interaction, and modulation of spin-rotational interaction] are considered within a...

  • Dynamic force microscopy in superfluid helium. Callaghan, F. D.; Yu, X.; Mellor, C. J. // Applied Physics Letters;7/29/2002, Vol. 81 Issue 5, p916 

    Piezoelectric quartz tuning forks have been used for topographic dynamic force imaging in superfluid helium and in high magnetic fields. This has been achieved by immobilizing one tine of the tuning fork to stabilize its behavior in superfluid. Images acquired at room temperature and at 50 K are...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics