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O. Avenel,
J. S. Xia,
B. Andraka,
C. S. Jee,
M-F. Xu,
Y. J. Qian,
T. Lang,
P. L. Moyland,
W. Ni,
P. J. C. Signore,
E. D. Adams,
G. G. Ihas,
M. W. Meisel,
G. R. Stewart,
N. S. Sullivan,
Y. Takano
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ABSTRACT: The magnetic susceptibility of a polycrystalline, single-phase sample of CeAl3 has been measured from 10 K to below 800 μK. Above 40 mK, the temperature dependence of the susceptibility is consistent with the results of other groups and possesses a broad peak around 500 mK. Using standard rf superconducting-quantum-interference-device detection techniques operating at 16 Hz, the sample, which was located in a shielded environment having a residual static field of less than 2 nT, was not observed to show any magnetic anomaly from 40 mK down to the lowest achievable temperature.
Phys. Rev. B. 02/1992; 45(10).
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J. Xu, O. Avenel,
J. S. Xia,
M-F. Xu,
T. Lang,
P. L. Moyland,
W. Ni,
E. D. Adams,
G. G. Ihas,
M. W. Meisel,
N. S. Sullivan,
Y. Takano
[show abstract]
[hide abstract]
ABSTRACT: Two nuclear-demagnetization cryostats, each containing 173 mol of copper coolant in a 8 T magnetic field and based on an Oxford Instruments model 1000 dilution refrigerator, have been under development at the University of Florida Microkelvin Laboratory for studies of nuclear magnetic ordering in metals and in solid3He, properties of superfluid3He at T0, and mesoscopic systems, and for development of primary thermometers based on population differences in nuclear quadrupole systems. The performance of the first cryostat is analyzed with emphasis on improvements to be made.
Journal of Low Temperature Physics 01/1992; 89(3):719-722. · 1.19 Impact Factor
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O. Avenel,
J. Xu,
J. S. Xia,
M-F. Xu,
B. Andraka,
T. Lang,
P. L. Moyland,
W. Ni,
P. J. C. Signore,
C. M. C. M. Woerkens,
E. D. Adams,
G. G. Ihas,
M. W. Meisel,
S. E. Nagler,
N. S. Sullivan,
Y. Takano,
D. R. Talham,
T. Goto,
N. Fujiwara
[show abstract]
[hide abstract]
ABSTRACT: The temperature dependent magnetic susceptibility, (T), of two samples of the S=1 linear-chain Heisenberg antiferromagnet Ni(C2H8N2)2NO2(ClO4), known as NENP, has been measured from 400 K to 264 K. Our measurements are in agreement with existing results of other researchers who worked above 1.2 K. Below 1.2 K, (T) increases with decreasing temperature. The results suggest that this increase is intrinsic to the NENP and is not a consequence of a single source of paramagnetic impurities in the samples.
Journal of Low Temperature Physics 01/1992; 89(3):547-550. · 1.19 Impact Factor
