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Nanocluster magnetic gel in superfluid He-II

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Abstract

The first results of the study of the structure of an impurity oxygen gel in superfluid He-II and in normal liquid helium have been obtained by the small-angle neutron scattering (SANS) method with cold neutrons. The angular dependence of the neutron scattering intensity I(q) indicates that the characteristic sizes of nanocluster aggregates forming a dispersive system (backbone) of an oxygen gel sample are distributed from 1 to ≈100 nm. According to the estimates made, if the working cell with superfluid helium cooled below 1.8 K is placed in a magnetic field of H ≥ 200 G, the magnetic structure of the nanocluster sample of oxygen gel, which is formed at the condensation of the flow of gaseous 4He with the impurity of O2 vapor on the surface of He-II, will be close to ferromagnetic.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia

    V. B. Efimov, A. V. Lokhov & L. P. Mezhov-Deglin

  2. Institut Laue-Langevin, Grenoble, 38000, France

    C. Dewhurst & V. V. Nesvizhevsky

  3. New York City College of Technology, City University of New York, Brooklyn, NY, 11201, USA

    G. V. Kolmakov

Authors
  1. V. B. Efimov
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  2. A. V. Lokhov
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  3. L. P. Mezhov-Deglin
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  4. C. Dewhurst
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  5. V. V. Nesvizhevsky
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  6. G. V. Kolmakov
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Correspondence to L. P. Mezhov-Deglin.

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Original Russian Text © V.B. Efimov, A.V. Lokhov, L.P. Mezhov-Deglin, C. Dewhurst, V.V. Nesvizhevsky, G.V. Kolmakov, 2014, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 99, No. 1, pp. 35–39.

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Efimov, V.B., Lokhov, A.V., Mezhov-Deglin, L.P. et al. Nanocluster magnetic gel in superfluid He-II. Jetp Lett. 99, 32–36 (2014). https://doi.org/10.1134/S0021364014010044

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