Magnetic measurements ofCeAl3to below 1 mK

Abstract

The magnetic susceptibility of a polycrystalline, single-phase sample of CeA13 has been measured from 10 K to below 800 pK. 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.

Field-induced long-range ordering in anS=1quasi-one-dimensional Heisenberg antiferromagnet

“…Usually Q1D antiferromagnets exhibit a long-range ordering ͑LRO͒ at finite temperature due to the interchain coupling (JЈ). 4 The compound Ni(C 2 H 8 N 2 ) 2 NO 2 (ClO 4 ), abbreviated NENP, is a typical example of Sϭ1 Q1D HAFs 5,6 and does not show any indication of LRO down to 300 K, 7 whereas the S ϭ1 Q1D HAF CsNiCl 3 shows LRO at ϳ4.7 K. 8 The different behavior between the two compounds comes from the difference in the strength of JЈ. How robust is the Haldane phase in a Q1D HAF against perturbation?…”

Ultralow temperature inductive measurements of YbBiPt

“…This particular experimental configuration was almost identical to one described in Ref. [7]. On the millikelvin cryostat, a calibrated Ge resistor served as the thermometer while on the microkelvin machine a 3He melting curve thermometer was used.…”