A comparison of the3He melting curve,T
c(P) curve,and the susceptibility of lanthanum-diluted cerium magnesium nitrate below 50 mK |
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Authors: | J M Parpia W P Kirk P S Kobiela Z Olejniczak |
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Affiliation: | (1) Department of Physics, Texas A&M University, College Station, Texas |
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Abstract: | The ac susceptibility of lanthanum-diluted cerium magnesium nitrate has been compared to the temperature scales as derived
from the (P, T) relation determined by Halperin and that was measured recently by Greywall. It is found that the susceptibility does
not obey a simple Curie-Weiss law over the temperature range between 1 and 50 mK. The results of these calibrations are also
used to determine the temperatures for the second-order phase transitions into the superfluid phases of3He at several pressures. TheseT
c(P) values are compared to results of earlier experiments that used thermometry based on the susceptibility of platinum as well
as other thermometry techniques. |
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Keywords: | |
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