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1,067 results on '"Mathur, N."'

15. Non-volatile voltage control of in-plane and out-of-plane magnetization in polycrystalline Ni films on ferroelectric PMN–PT (001)pc substrates.

Author

Ghidini, M., Ye, F., Steinke, N.-J., Mansell, R., Barnes, C. H. W., and Mathur, N. D.

Subjects
MAGNETOELECTRIC effect, VOLTAGE control, MAGNETIZATION, MAGNETIC anisotropy, PERPENDICULAR magnetic anisotropy, MAGNETIC domain, MAGNETIZATION reversal
Abstract

We identify room-temperature converse magnetoelectric effects (CMEs) that are non-volatile by using a single-crystal substrate of PMN–PT (001)pc (pc denotes pseudocubic) to impart voltage-driven strain to a polycrystalline film of Ni. An appropriate magnetic-field history enhances the magnetoelectric coefficient to a near-record peak of ∼10−6 s m−1 and permits electrically driven magnetization reversal of substantial net magnetization. In zero magnetic field, electrically driven ferroelectric domain switching produces large changes of in-plane magnetization that are non-volatile. Microscopically, these changes are accompanied by the creation and destruction of magnetic stripe domains, implying the electrical control of perpendicular magnetic anisotropy. Moreover, the stripe direction can be rotated by a magnetic field or an electric field, the latter yielding the first example of electrically driven rotatable magnetic anisotropy. The observed CMEs are associated with repeatable ferroelectric domain switching that yields a memory effect. This memory effect is well known for PMN–PT (110)pc but not PMN–PT (001)pc. Given that close control of the applied field is not required as for PMN–PT (110)pc, this memory effect could lead the way to magnetoelectric memories based on PMN–PT (001)pc membranes that switch at low voltage. [ABSTRACT FROM AUTHOR]

Published
2021
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20. Ferroelectric Control of Spin Polarization

Author

Garcia, V., Bibes, M., Bocher, L., Valencia, S., Kronast, F., Crassous, A., Moya, X., Enouz-Vedrenne, S., Gloter, A., Imhoff, D., Deranlot, C., Mathur, N. D., Fusil, S., Bouzehouane, K., and Barthélémy, A.

Published
2010
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21. Can physical activity maintain normal grades of body mass index and body fat percentage?

Author

Kesavachandran C, Bihari V, and Mathur N

Subjects
Body fat percentage, body mass index, physical activity., Miscellaneous systems and treatments, RZ409.7-999
Abstract

Background/Aims : A cross-sectional study was undertaken on 767 urban male volunteers performing physical activity and 469 age and socioeconomic status matched controls not doing any physical activity from the city limits of North India. Materials and Methods : Height and weight were recorded for each participant to determine their Body Mass Index (BMI). Body fat percentage and weight was measured using a body fat monitor. Results : Fifty three percent of the physical activity performers showed normal BMI compared to 49% nonphysical activity performers. Overweight was observed in 43.3% physical activity performers compared to 44.7% nonphysical activity performers. Fifty two percent of physical activity performers had normal body fat percent compared to 48.5% nonphysical activity performers. Low body fat percent was observed in 23.4% physical activity performers compared to 2.7% nonphysical activity performers. High body fat percent was observed in 48.7% nonphysical activity performers compared to 45.8% physical activity performers. Conclusions: Overall, the study suggested that physical activity alone cannot maintain BMI and body fat percent, but it can reduce the risk of overweight and high body fat percent in the population.

Published
2009

22. Bladder Management Outcome after Spinal Cord Injury: A Prospective Study

Author

Srivastava A and Mathur N

Subjects
neurogenic bladder, incontinence, intermittent catheterization, spinal cord injury, urinary tract infection, Medicine
Abstract

Objectives: To assess the mode of bladder management, reasons for stopping intermittent catheterization and complications encountered in bladder management Design: Prospective follow up studySetting: Dept. of PM&R of a tertiary center Methods: Spinal cord injured patients admitted in the unit with at least one-year follow up duration (Total - 479). 124 (25.9%) patients were followed up, mean duration of 23.3 months, of which 48 (38.7%) regained bladder control and were excluded. Results: At initial admission, seventy-one patients (total n=76) were discharged on clean intermittent catheterization. At follow up, 47 (66.1%) stopped intermittent catheterization; ability to pass urine was the primary reason for stopping it in 33 (63.4%) patients. Reflex emptying was the most favored mode of bladder management in 25 (32.9%) along with intermittent catheterization in 24 (31.5%) patients. Bladder autonomy and catheter free status was achieved by 54 (71%) and 39 (51.3%) patients respectively. 69 (90.7%) patients experienced urinary incontinence and 36 (34.2%) had urinary tract infection. Antibiotics and anti-cholinergics were commonly prescribed adjunctive medications in 26 (34.2%) and 16 (20.1%) patients respectively. Conclusion: Most patients stopped doing intermittent catheterization and shifted to other modes of bladder management as per their convenience due to poor follow up.

Published
2008

28. Enterogenous cyst presenting as mediastinal mass in a newborn

Author

Jain, Nidhi, Gupta, Vijay, Mathur, N., Kumar, Ajay, Khurana, Nita, and Sarin, Yogesh

Subjects
Health
Abstract

Byline: Nidhi. Jain, Vijay. Gupta, N. Mathur, Ajay. Kumar, Nita. Khurana, Yogesh. SarinDuplication cyst is a rare congenital malformation. Enterogenous cyst are foregut duplication cyst with or without a vertebral [...]

Published
2019

43. Working group report: Quark gluon plasma

Author

Roy, Pradip, Mohanty, Bedangadas, Balchandran, A. P., Bhattacharyya, A., Chaudhuri, A. K., Datta, S., Digal, S., Flueret, F., Gupta, S., Jaikumar, P., Lee, S. H., Mathur, N., Mishra, A., Mishra, A. P., Mishra, H., Mohanty, B., Roy, P., Somia, P. S., and Srivastava, A. M.

Published
2009
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47. Asymmetric electrocaloric effects in PbSc0.5Ta0.5O3 on field application and removal

Author

Stern-Taulats, E., Lloveras, P., Barrio, M., Tamarit, J. -Ll., Planes, A., Ma��osa, Ll., Whatmore, R. W., Mathur, N. D., and Moya, X.

Subjects
Condensed Matter - Materials Science, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences
Abstract

Electrically driven thermal changes in PbSc0.5Ta0.5O3 bulk ceramics are investigated using temperature and electric-field dependent differential scanning calorimetry and infrared thermometry. On first application and removal of electric field, we find asymmetries in the magnitude of isothermal entropy change $\Delta$ S and adiabatic temperature change $\Delta$ T, due to hysteresis. On subsequent field cycling, we find further asymmetries in the magnitude of $\Delta$ T due to non-linearity in the isofield legs of entropy-temperature plots.

Published
2020

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