NMR Studies of He Droplets in Dilute He-He Solid Solutions

Huan, C.; Kim, S.; Yin, L.; Xia, J.; Candela, D.; Sullivan, N.
February 2011
Journal of Low Temperature Physics;Feb2011, Vol. 162 Issue 3/4, p167
Academic Journal
We have performed measurements of the temperature dependence of the nuclear spin-lattice relaxation times ( T) for a wide range of He concentrations for dilute mixtures of He in solid He. The temperatures for phase separation are determined for He concentrations 500< x<2000 ppm for a molar volume V=20.7 cm. We report the temperature dependence of the nuclear spin-lattice relaxation times for He in the droplets formed after phase separation at low temperatures. The temperature dependence suggests that the interface He atoms responsible for the relaxation are degenerate, not solid-like.


Related Articles

  • Simultaneous Measurement of Torsional Oscillator and NMR in Solid He with 10 ppm of He. Toda, R.; Onoe, W.; Kanemoto, M.; Kakuda, T.; Tanaka, Y.; Sasaki, Y. // Journal of Low Temperature Physics;Mar2011, Vol. 162 Issue 5/6, p476 

    We have performed the simultaneous measurement of torsional oscillator and NMR in solid He with 10 ppm of He at 3.6 MPa. In this solid, NCRI response appears below about 400 mK. NMR measurement shows that there is the same kind of phase-separated He cluster which is found in our previous...

  • 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...

  • Nuclear Spin Relaxation Times for Methane-Helium “Slush” at 4 MHz using Pulsed NMR. Hamida, J. A.; Sullivan, N. S. // AIP Conference Proceedings;2006, Vol. 850 Issue 1, p378 

    We report measurements of the nuclear spin-lattice relaxation times (T1) and spin-spin relaxation times (T2) for small grains of methane suspended in liquid helium (methane-helium “slush”) for temperatures 2 K

  • Isotopes Substitution Effects on the Spin Tunneling in the Molecular Nanomagnet Fe8 Studied by 57Fe-NMR. Furukawa, Y.; Hatanaka, Y.; Kumagai, K.; Baek, S.-H.; Borsa, F. // AIP Conference Proceedings;2006, Vol. 850 Issue 1, p1147 

    We have carried out 57Fe-NMR in both non-deuterated and partially deuterated 57Fe-enriched Fe8 clusters at very low temperature (i.e. below 1K) to investigate the isotope substitution effects on the quantum tunneling of the magnetization. Above ∼400mK the 57Fe spin-lattice relaxation rate...

  • Temperature Dependence of the Spin–Lattice Relaxation Time for Quadrupole Nuclei under Conditions of NMR Line Saturation. Mikushev, V. M.; Ulyashev, A. M.; Charnaya, E. V.; Chandoul, A. // Physics of the Solid State;Jun2002, Vol. 44 Issue 6, p1044 

    The contributions of different mechanisms of nuclear spin–lattice relaxation are experimentally separated for [sup 69]Ga and [sup 71]Ga nuclei in GaAs crystals (nominally pure and doped with copper and chromium), [sup 23]Na nuclei in a nominally pure NaCl crystal, and [sup 27]Al nuclei in...

  • Vibrational motions and nuclear spin relaxation in paramagnetic complexes: Hexaaquonickel(II) as an example. Kruk, Danuta; Kowalewski, Jozef // Journal of Chemical Physics;3/8/2002, Vol. 116 Issue 10, p4079 

    The proton paramagnetic relaxation enhancement (PRE) in an aqueous solution of nickel(II) is described in terms of electron spin relaxation caused by damped vibrational motions of E[sub g] and T[sub 2g] symmetry. The damped vibrations generate a transient zero-field splitting (ZFS), of variable...

  • Proton and deuteron spin-lattice relaxation times in HD-Ar mixtures: A combined experimental and.... Sabzyan, Hassan; Power, William P. // Journal of Chemical Physics;4/15/1998, Vol. 108 Issue 15, p6170 

    Examines the nuclear magnetic resonance (NMR) spin lattice relaxation times for the proton and deuteron of HD-Ar mixtures. Measurements of HD-Ar mixtures in different temperature range; Association of the theoretical values of the spin-lattice relaxation times with the HD-Ar interaction;...

  • Heavy electrons and the symplectic symmetry of spin. Flint, Rebecca; Dzero, M.; Coleman, P. // Nature Physics;Aug2008, Vol. 4 Issue 8, p643 

    The recent discovery of two heavy-fermion materials PuCoGa5 and NpPd5Al2, which transform directly from Curie paramagnets into superconductors, reveals a new class of superconductors where local moments quench directly into the superconducting condensate. Unlike other heavy-electron...

  • Lattice Relaxation in Solid He: Effect on Dynamics of He Impurities. Sullivan, N.; Candela, D.; Kim, S.; Huan, C.; Yin, L.; Xia, J. // Journal of Low Temperature Physics;Apr2014, Vol. 175 Issue 1/2, p133 

    We present a new simplified derivation of the effect of lattice relaxation that accompanies the quantum tunneling of He impurities in solid He on the nuclear spin-lattice relaxation of the He impurities for very low impurity concentrations. As a result of the larger zero point motion of the He...


Read the Article


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

Try another library?
Sign out of this library

Other Topics