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Physical Review B
We performed low-frequency sound measurements on 3 He in 98% aerogel in a magnetic field that was varied between 0 and 2130 G at a fixed pressure of 27.9 bar. We monitor the frequency of the second sound like ͑slow͒ mode, which is the manifestation of superfluidity of 3 He in the presence of correlated disorder, and use its temperature dependence to calculate the superfluid fraction s / . We observed no field dependence of the s ͑T͒ / , other than an increase in the temperature range where thedoi:10.1103/physrevb.71.144506 fatcat:2y4b2agabbcqplg5vbaqufexwu