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1.
We have employed the TDPAC technique to measure the paramagnetic enhancement factor of140Ce in CeRh3B2 in the temperature range 300 K down to 115 K. Our measurements show that above Tc=115 K, the trend for(T) closely follows that for trivalent cerium. 相似文献
2.
S. N. Mishra D. Rambabu A. K. Grover R. G. Pillay P. N. Tandon H. G. Devare R. Vijayaraghavan 《Hyperfine Interactions》1986,28(1-4):471-474
57Fe Mössbauer and magnetization studies on a new series Fe4–2xRuxSix (1.0x1.7) are reported. The system is seen to transform from a collinear ferromagnet for x1.2 to a cluster spin glass for x>=1.54 In the intermediate region the magnetic behaviour of the system, as probed by the Mössbauer effect, is dominated by the presence of clusters and their dynamics. The alloys have large ordering temperatures ( 750 K) throughout the series except for x>1.54 where they drop sharply. The moment values, in contrast, fall sharply from 4.8B at x=1 to 0.5B at x=1.6C. The average value of the HF at57Fe measured at 15 K does not change significantly throughout the series. 相似文献
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4.
Sanghamitra Khatua S. N. Mishra S. H. Devare H. G. Devare 《Hyperfine Interactions》1993,78(1-4):547-552
The local susceptibilities (T) of isolated Rh impurities in paramagnetic dilute Pt(Fe) alloys have been measured using the TDPAC method. The results show existence of 4d magnetic moment for Rh with reduced spin fluctuation temperatures (T
sf). It is suggested that moment stability scaled byT
sf is governed mainly by the interatomic d-d exchange interaction caused by induced ferromagnetic polarization of host d band electrons. 相似文献
5.
V. V. Krishnamurthy S. N. Mishra Ravi Kumar S. H. Devare H. G. Devare 《Hyperfine Interactions》1993,78(1-4):541-545
Local magnetic behaviour of Rh implanted into Ni-Rh alloys near the critical Rh compositionx=0.37 has been studied using the TDPAC method. The observed Curie-Weiss type local susceptibility reflects the presence of large d spin polarization around Rh yielding a total moment of 4.7 B. Our results show that the magnetism of Rh in the alloys depends strongly on the number of Ni near neighbour atoms. 相似文献
6.
The quandrupole interaction at181Ta in tellurium measured at various temperatures revealed two unique sites with an axially symmetric electric field gradient. These are interpreted as a near substitutional site with almost octahedral symmetry and a pure interstitial site in the tellurium lattice. The temperature dependence observed for QI frequencies corresponding to these sites supports this conclusion. 相似文献
7.
The sharp, temperature induced, continuous valence transition in EuPd2Si2 is drastically changed by doping with Sn at the Si site upto 5 at. %. Only a first order valence transition occurs for a 3% Sn doped sample and the 2+ component which survives the valence transition orders magnetically at 4.2 K. No valence transition at all occurs for a 5% Sn doped sample right up to 1.9 K and magnetic ordering sets in around 30 K. 相似文献
8.
J. Goswamy A. Sharma D. Mehta B. Chand N. Singh P. N. Trehan P. Singh R. G. Pilley H. G. Devare R. K. Bhowmik C. R. Praharaj 《Zeitschrift für Physik A Hadrons and Nuclei》1992,344(2):233-234
High spin states in 120Xe, populated via107Ag(16O, p2n) and108Pd(16O, 4n)reactions have been studied using γ-ray spectroscopic techniques. 21 new transitions have been added to extend the level scheme. Two S-bands are extended upto 26+ and 22+;these bands are found to cross the g. s band at hΩ=0. 39 and 0. 47 MeV. The band structures have been discussed within the framework of CSM. 相似文献
9.
The quadrupole interaction (QI) in hexagonal close packed zinc lattice was measured using the 482 keV, 10.6 ns probe state of181Ta employing the time-differential perturbed angular correlation technique. The electric field gradient (EFG) at181Ta in Zn was derived from the measured quadrupole interaction frequency at room temperature asV
zz
=12.202×1017 V/cm2. The quadrupole interaction measured at various temperatures displayed normal temperature dependence similar to that seen by this probe in many non-cubic hosts. 相似文献
10.
P. N. Tandon V. S. Patil A. K. Grover R. G. Pillay H. G. Devare 《Hyperfine Interactions》1983,16(1-4):709-712
A new class of magnetic system RuxFeySi, has been identified in which the hyperfine field at Fe, as sensed by57Fe Mossbauer effect, is seen to evolve at a characteristic temperature far below the bulk magnetic ordering temperatures. 相似文献