58 research outputs found
REVENUE-EXPENDITURE NEXUS FOR SOUTHERN STATES : SOME POLICY ORIENTED ECONOMETRIC OBSERVATIONS
The paper examines the temporal relationship between revenues and expenditures for the four southern states during 1980 to 2005. Using an error-correction model and Granger causality test, it finds that the taxspend hypothesis is supported by the analsysis. The spend-tax hypothesis is valid for Karnataka; fiscal synchronization hypothesis is supported for Andhra Pradesh and Kerala, while the data for Tamil Nadu failed to show any causality.Revenue Expenditure, Indian States, Cointegration
Field-induced first-order magnetic phase transition in an intermetallic compound, Nd7Rh3: Evidence for kinetic-hindrance, phase co-existence and percolative conduction
The compound, Nd7Rh3, crystallizing in Th7Fe3-type hexagonal structure, was
previously known to exhibit two magnetic transitions, one at 32 K and the other
at 10 K (in zero magnetic field). Here, we report the existence of a
field-induced first-order antiferromagnetic to ferromagnetic transition at 1.8
K in this compound. On the basis of the measurements of isothermal
magnetization and magnetoresistance, we provide evidence for the occurence of
kinetic-hindrance, proposed in the literature, resulting in phase co-existence
(super-cooled ferromagnetic + antifferomagnetic) and percolative electrical
conduction in this stoichiometric intermetallic compound. A point of emphasis,
as inferred from ac susceptibility data, is that such a co-existing phase is
different from spin-glasses, thereby clarifying a question raised in the field
of phase-separation.Comment: A Shortened version will appear in print in PRB (Rapid Comm). Phys.
Rev. B (Rapid Comm), in pres
Magnetic behaviour of quasi-one-dimensional oxides, CaCoMnO
The results of ac and dc magnetization and heat capacity measurements on the
oxides, CaCoMnO, forming in a KCdCl-derived
rhombohedral quasi-one-dimensional crystal structure, are reported. As far as
CaCoO is concerned, the results reveal truly complex nature of the
two magnetic transitions, identified to set in at 24 and 12 K in the previous
literature. However, partial replacement of Co by Mn apparently results in a
long magnetic ordering of an antiferromagnetic type (below 13 and 18 K for x=
0.0 and 0.25 respectively), instead of spin-glass freezing in spite of the fact
that there is Co-Mn disorder; in addition, interestingly there are hysteretic
spin reorientation effects as revealed by isothermal magnetization behavior
An anomalous magnetic phase transition at 10 K in Nd7Rh3
The compound, Nd7Rh3, crystallizing in Th7Fe3-type hexagonal structure, has
been shown recently by us to exhibit a signature of magnetic phase-coexistence
phenomenon below 10 K after a field cycling, uncharacteristic of stoichiometric
intermetallic compounds, bearing a relevance to the trends in the field of
electronic phase-separation. In order to characterize this compound further, we
have carried out dc magnetic susceptibility (chi), electrical resistivity,
magnetoresistance and heat-capacity measurements as a function temperature (T=
1.8 to 300 K). The results reveal that this compound exhibits another unusual
finding at the 10K-transition in the sense that the plot of chi(T) shows a
sharp increase in the field-cooled cycle, whereas the zero-field-cooled curve
shows a downturn below the transition. In addition, the sign of
magnetoresistance is negative and the magnitude is large over a wide
temperature range in the vicinity of magnetic ordering temperature, with a
sharp variation at 10 K. The results indicate that the transition below 10 K is
first-order in its character.Comment: Appeared in JPCM (Letters) 18 (2006) L40
Electrical resistivity and tunneling anomalies in CeCuAs2
The compound CeCuAs2 is found to exhibit negative temperature (T) coefficient
of electrical resistivity (rho) under ambient pressure conditions in the entire
T-range of investigation (45 mK to 300 K), even in the presence of high
magnetic fields. Preliminary tunneling spectroscopic measurements indicate the
existence of a psuedo-gap at least at low temperatures, thereby implying that
this compound could be classified as a Kondo semi-conductor, though rho(T)
interestingly is not found to be of an activated type.Comment: To appear in the proceedings of SCES200
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