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51.
A. Schenck A. Amato F.N. Gygax M. Pinkpank A. Jung P. Wachter J. Major Th. Stammler R. Scheuermann 《Hyperfine Interactions》1997,104(1-4):209-213
The pressure dependence of the μ+-Knight shift in the pseudo‐binary compound Sm0.9La0.1S has been studied with the aim to verify microscopically the quenching of paramagnetism by the formation and condensation
of excitons in the insulating regime. A collapse of the μ+-Knight shift is indeed observed but it is not restricted to the insulating phase and may not reflect the bulk‐magnetic response.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
52.
A. Grayevsky T. Tashma I. Felner Z. Kalman N. Kaplan F. Gygax A. Amato M. Pinkpank A. Schenck 《Hyperfine Interactions》1997,104(1-4):67-71
A previously unobserved increase of the magnetic susceptibility in PrIn3 at low temperatures is reported. The increase is shown to correlate nicely with a large increase in the transverse μSR depolarization
rate. Evidence supports the conclusion that both phenomena are related to some degree of atomic disorder in the structure,
and an associated strong Pr CEF level changes.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
53.
A. Lappas K. Prassides A. Amato R. Feyerherm F. N. Gygax A. Schenck 《Hyperfine Interactions》1994,86(1):555-560
We report a muon spin relaxation study of the magnetic properties of the La1.2Tb0.8CuO4 phase with the T* structure. Random magnetic order is revealed between 280 and 170 K by the zero field data. A spontaneous muon precession then appears below 170 K, arising from antiferromagnetic long range order of the Cu2+ spins. Evidence exists below 20 K for ordering of the Tb3+ ions. We find that the T* phase adopts the same magnetic structure as the (T/O) phase La2CuO4. 相似文献
54.
55.
56.
R. Feyerherm A. Amato F. N. Gygax A. Schenck U. Zimmermann A. Grayevsky N. Kaplan 《Hyperfine Interactions》1994,84(1):329-335
New transverse field measurements on single crystal PrNi5 have been carried out. The angular dependence of the Knight shift indicates
+ at f-sites of the hexagonal unit cell [(1/2 0 0), (0 1/2 0), (1/2 1/2 0)] in apparent contrast to previous conclusions. It is confirmed that the temperature dependence of the Knight shift does not scale with the bulk susceptibility. While the latter shows a distinct maximum around 15 K and Van Vleck behaviour for T0 K, the Knight shift does not exhibit any saturation down to 2 K. This peculiar behaviour is explained by a
+-induced change of the crystal field level scheme of the nearest-neighbour Pr3+-ions that significantly reduces the splitting between the lowest lying levels. 相似文献
57.
The low temperature ( 0.6 K) ZF-SR signal in the heavy electron compound CeAl3 displays a three component structure with one component revealing the precession of
+ in a static internal field of 220 G. Surprisingly the phase of this signal is shifted by the order of 90° which indicates the presence of a precursor state. The precursor state manifests itself by a quickly decaying nonoscillating component. A simple two state model with zero average field in the precursor state and 220 G in the final state can describe the results except for the magnitude of the phase shift. 相似文献
58.
Evgenji Krasnoperov Evgenji E. Meilikhov Dimitrji Eschenko Dierk Herlach Elvezio Morenzoni Ulrich Zimmermann Fredy N. Gygax Alexander Schenck 《Hyperfine Interactions》1994,87(1):1017-1022
We report the first measurements of the positive-muon spin depolarization in liquid3He. The relaxation of the muon and muonium precession has been studied in transverse, longitudinal, and zero magnetic fields in the temperature range 0.5–2.5 K. The results are discussed in terms of two different depolarization mechanisms: recombinational depolarization (i.e. slow muonium formation) and magnetic relaxation due to the3He nuclear magnetic moments. 相似文献
59.
60.
F. N. Gygax A. Hintermann W. Rüegg A. Schenck W. Studer A. J. van der Wal L. Schlapbach 《Hyperfine Interactions》1984,17(1-4):377-382
The
+ Knight shift in platinum has been measured between 20 K and 785 K. It shows a strong temperature dependence and scales with the magnetic bulk susceptibility. A temperature independent contribution of +40 to +60 ppm and a d-electron induced hyperfine field per unpaired d-electron per atom ofB
hf,d
=–5.03 kG (±8.5%) are obtained. The
+ Knight shift in PdH0.70 and PdH0.75 shows no dependence on temperature between 20 K andRT and increases fromK
ppm forx=0.70 toK
ppm forx=0.75, in good agreement with proton Knight shift measurements. 相似文献