3,349 research outputs found
Fe-spin reorientation in PrFeAsO : Evidences from resistivity and specific heat studies
We report the magnetic field dependence of resistivity () and specific
heat () for the non-superconducting PrFeAsO compound. Our study shows a
hitherto unobserved anomaly at in the resistivity and specific heat
data which arises as a result of the interplay of antiferromagnetic (AFM) Pr
and Fe sublattices. Below the AFM transition temperature (), Pr
moment orders along the crystallographic c axis and its effect on the iron
subsystem causes a reorientation of the ordered inplane Fe moments in a
direction out of the plane. Application of magnetic field introduces
disorder in the AFM Pr sublattice, which, in turn, reduces the out-of-plane
Pr-Fe exchange interaction responsible for Fe spin reorientation. Both in
() and curves, the peak at broadens with the
increase of due to the introduction of the disorder in the AFM Pr
sublattice by magnetic field. In () curve, the peak shifts towards
lower temperature with and disappears above 6 T while in curve
the peak remains visible up to 14 T. The broadening of the anomaly at
in with increasing further confirms that magnetic
field induces disorder in the AFM Pr sublattice.Comment: 8 pages, 10 Figure
Quantm Magnetoresistance of the PrFeAsO oxypnictides
We report the observation of an unusual dependence of transverse
magnetoresistance (MR) in the PrFeAsO, one of the parent compound of pnictide
superconductors. Below the spin density wave transition, MR is large, positive
and increases with decreasing temperature. At low temperatures, MR increases
linearly with up to 14 T. For 40 K, MR vs curve develops a
weak curvature in the low-field region which indicates a crossover from
linear to dependence as 0. The linear MR originates
from the Dirac cone states and has been explained by the quantum mechanical
model proposed by Abrikosov.Comment: accepted for publication in Appl. Phys. Let
Temperature Variation of Debye-Waller Factor and Mean Square Displacement for some Transition Metals
Masses and decay modes of charmonia using a confinement model
The masses of charmonium s and p-states, pseudoscalar and vector decay
constants, leptonic, hadronic as well as radiative decay widths for charmonia
have been computed in the framework of extended harmonic confinement model
without any additional parameters. The outcome in comparison with other
contemporary theoretical and experimental results is presented.Comment: Submitted to AIP for proceedings of International Workshop on
Theoretical High Energy Physics held at IIT Roorkee, INDIA during 15-20
March, 200
Ayurvedic Management of Infertility W.S.R. Anovulation: A Case Study
Patient was anxious to conceive after active married life of 5 years. The present case study was done to evaluate the role of Ayurvedic Shodhana therapy i.e. Yogabasti for two consecutive menstrual cycles in the management of anovulation. After completing two courses of Yogabasti, improvement was noticed i.e. Ovulation study (during treatment - anovulatory cycle, After treatment - ovulatory cycle). The line of treatment was followed in this case was to treat the provoked Vata Dosha and vitiated Rasa Dhatu. There were no adverse effects found during the Ayurvedic Panchakarma procedure i.e. Yogabasti.
Keywords: Anovulation, Panchakarma, Shodhana, Yogabast
Life Satisfaction of Highly Qualified Professionally Achieving Women Post Retirement
In this paper life satisfaction of highly qualified professionally achieving HQPA aging women post retirement is investigated Respondents were 306 HQPA older women who were surveyed in the city of Mumbai The Satisfaction with Life scale Silver Lining Questionnaire and Meaning in Life Questionnaire were used Results showed variations on life satisfaction as a result of certain independent socio-demographic variables and the type of careers that HQPA women retired from Findings have relevance for designing and promoting different types of activity engagement for HQPA older women This is a move away from the solely poverty focused approach to addressing issues of aging population in India Implications for practice with HQPA older women have also been discusse
Superconductivity in 2-2-3 system Y2Ba2Cu2O(8+delta)
Researchers synthesized a new high T(sub c) 2-2-3 superconductor Y2Ba2Cu3O(8+delta) by a special preparation technique and characterized it by ac-susceptibility measurements. Diamagnetism and Meissner effect sets in at low fields and superconducting transition onsets at 90 K. The systematic investigation of the real and imaginary components of ac-susceptibility as a function of temperature and applied ac magnetic field reveals that the magnetic behavior is that of a granular type superconductor
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