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| VOLUME 122 (2025) | ISSUE 7 | PAGE 427 |
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A1-A2 splitting in pure 3He in nematic aerogel
V. V. Dmitriev+, M. S. Kutuzov*, D. V. Petrova+×, A. A. Soldatov+, A. N. Yudin+
+P. L. Kapitza Institute for Physical Problems of Russian Academy of Sciences, 119334 Moscow, Russia *Metallurg Engineering Ltd., 11415 Tallinn, Estonia ×National Research University Higher School of Economics University, 101000 Moscow, Russia
Abstract
Here, we present the results of vibrating wire experiments in pure 3He (without 4He coverage) in nematic aerogel. We investigated the dependence of splitting of the superfluid transition temperature of 3He in aerogel on magnetic field. In addition to our previous work, we used a wider range of magnetic fields (up to 31 kOe) and managed to detect both the "upper" and "lower" superfluid transition temperatures. The solid paramagnetic 3He layer on the aerogel strands activates the magnetic scattering channel. According to theory, it should result in linear splitting at high (  kOe) fields, while at lower
fields the splitting is expected to be nonlinear. We were able to observe
this nonlinearity, but we have a discrepancy with theoretical predictions
regarding the range of fields where nonlinearity occurs. Possible reasons
for this are discussed.
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