P L Paulose
Articles written in Pramana – Journal of Physics
Volume 28 Issue 6 June 1987 pp 1- Rapid Communications
Electromagnetic response of a single phase Y-Ba-Cu-O compound superconducting in the 90 K range
V Nagarajan P L Paulose A K Grover S K Dhar E V Sampathkumaran
The results of x-ray diffraction, electrical resistance, DC and AC magnetization studies on two specimens of compositions Y2.1Ba3.9Cu6O14−δ and Y1.8Ba4.2Cu6O14−δ are presented. Our studies confirm that La3Ba3Cu6O14 type orthorhombic phase is responsible for superconductivity in the 90 K range. The heat treatment that yields high quality samples with sharp transition in electrical resistance as well as in AC magnetic susceptibility measurements is described. Magnetic response just below
Volume 33 Issue 2 August 1989 pp 297-313 Condensed Matter Physics
Thermomagnetic history effects in niobium and its implication for H
A K Grover P L Paulose P Chaddah G Ravikumar
The existence of a remanent magnetization (
Volume 37 Issue 6 December 1991 pp 525-538 Research Articles
A K Grover S Ramakrishnan Ravi Kumar P L Paulose S K Malik P Chaddah
A comparison has been made of irreversibility temperature determined by four different methods in few specimens of lead (type-I) and niobium (type-II). The merger of
Volume 38 Issue 6 June 1992 pp 641-667 Research Articles
Magnetization studies in niobium and YBa2Cu3O7 samples
B V B Sarkissian A K Grover G Balakrishnan Ravi Kumar P L Paulose R Vijayaraghavan V Sankaranarayanan C K Subramanian
The results of experimental studies on hysteresis in magnetization, thermomagnetic history effects, anomalous variations in magnetic hysteresis curves and the decay rates of magnetization obtained under different thermomagnetic histories in specimens of conventional and high temperature superconductors are presented. The Bean’s critical state model is considered adequate to explain magnetic behaviour in conventional hard superconductors. The similarity in the general features of the results of different experiments on specimens of the two families of superconductors underscores the efficacy of the said model to understand some aspects of the macroscopic magnetic response of high temperature superconductors as well. For instance, the isothermal magnetization hysteresis loop which comprises of magnetization curves along forward (−
Volume 97, 2023
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