SQUID measurements of the susceptibilities of impurity-helium condensates Academic Article uri icon

abstract

  • For the first time, the magnetic susceptibilities of impurity-helium condensates containing magnetic impurities have been measured via a SQUID magnetometer in the temperature range between 1.1 and 2.1 K. The impurity-helium condensates are gel-like aggregates of nanocrystallites composed of molecules and free radicals. Molecular oxygen nanocrystals and atomic nitrogen embedded in molecular N 2 nanocrystals have been studied. The susceptibilities of the samples containing nitrogen atoms followed Curie-Weiss behavior with very small Weiss temperatures ranging from +0 to -0.4 K. The behavior of samples composed of O 2 nanocrystals deviated sharply from the results for bulk solid O 2. The susceptibility of the samples was 10 2 larger than for bulk solid O 2 and showed Curie-Weiss behavior with a Weiss temperature in the range from -4.5 to -5 K. This result is qualitatively consistent with results obtained in other laboratories for O 2 confined in restricted geometries. Springer Science+Business Media, LLC 2008.

published proceedings

  • JOURNAL OF LOW TEMPERATURE PHYSICS

author list (cited authors)

  • Jarvinen, J., Paulsen, C., Bernard, E. P., Khmelenko, V. V., & Lee, D. M.

citation count

  • 2

complete list of authors

  • Jarvinen, J||Paulsen, C||Bernard, EP||Khmelenko, VV||Lee, DM

publication date

  • July 2008