Abstract
We present DC and low frequency AC magnetization measurements on various RBa2Cu3O7 superconductors. We identify features intrinsic to these compounds, and establish the features originating from intergranular links in sintered pellets. The isothermal magnetization curves, and the temperature dependence of magnetization in field-cooled and zero field-cooled states are shown to be consistent with the calculations done following a recent extension of Bean’s model. Low field anomalies predicted within this model are observed, and yieldH c1 values of a few Oe. These values are shown to be consistent with the temperature variation of magnetization. A comparison is made with the other existing data and it is demonstrated that earlier quoted values ofH c1 are gross overestimates.
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References
Bean C P 1962Phys. Rev. Lett. 8 250
Bean C P 1964Rev. Mod. Phys. 36 31
Campbell A M and Evetts J E 1972Adv. Phys. 21 199
Clem J R and Kogan V G 1987Jpn. J. Appl. Phys. Suppl. 26 1161
Crabtree G W, Lin J Z, Umezawa A, Kwok W K, Sowers C H, Malik S K, Veal B W, Lam D J, Brodsky M B and Downey J W 1987Phys. Rev. B36 4021
Dinger T R, Worthington T K, Gallagher W J and Sandstrom R L 1987Phys. Rev. Lett. 58 2687
Farrell D E, Chandrasekhar B S, DeGuire M R, Fang M M, Kogan V G, Clem J R and Finnemore D K 1987Phys. Rev. B36 4025
Gammel P L, Bishop D J, Dolan G J, Kwo J R, Murray C A, Schneemeyer L F and Waszczak J V 1987Phys. Rev. Lett. 59 2592
Grover A K 1988 (submitted)
Grover A K, Radhakrishnamurty C, Chaddah P, Ravi Kumar G and Subba Rao G V 1988Pramana — J. Phys. 30 L167
Hammann J, Ocio M, Bertinotti A, Luzet D, Vincent E, Revcolevschi A and Jegoudez J 1987 (preprint)
Likhite S D and Radhakrishnamurty C 1966Curr. Sci. 35 534
Maletta H, Malozemoff A P, Cronemeyer D C, Tsuei C C, Greene R L, Bednorz J G and Mueller K A 1987Solid State Commun. 62 323
Marcus J, Escribe-Filippini C, Schlenker C, Buder R, Devenyi J and Reyder P L 1987Solid State Commun. 63 129
Noto K, Morita H, Watanabe K, Murakami Y, Obi Y, Fujimori H, Kobayashi N and Muto Y 1987Jpn. J. Appl. Phys. Suppl. 26 1195
Padamsee H 1987 (preprint)
Radhakrishnamurty C, Likhite S D and Sastry N P 1971Philos. Mag. 23 503
Ravi Kumar G and Chaddah P 1987 (submitted)
Ravi Kumar G and Chaddah P 1988 (submitted)
Renker B, Apfelstedt I, Kupfer H, Politis C, Rietschel H, Schauer W, Wuhl H, Gottwick U, Kneissel H, Rauchschwalbe U, Spille H and Steglich F 1987Z. Phys. B67 1
Rosenberg M, Mittag M, Job R, Chojetzki W, Wernhardt R, Sabrowsky H and Neubauer R 1987Z. Phys. B69 151
Schneemeyer L F, Gyorgy E M and Waszczak J V 1987Phys. Rev. B36 8804
Senoussi S, Oussena M and Collin G 1987a (preprint)
Senoussi S, Oussena M, Ribault M and Collin G 1987bPhys. Rev. B36 4003
Senoussi S, Oussena M and Hadjoudj S 1987cJ. Appl. Phys. (in press)
Subba Rao G V, Varadaraju U V, Thomas K A, Vijayashree R, Raju N P, Srinivasan R, De U, Janaki J and Radhakrishnan T S 1987Jpn. J. Appl. Phys. Suppl. 26 1077
Umezawa A, Crabtree G W, Liu J Z, Weber H W, Kwok W L, Nunez L H, Moran T J, Sowers C H and Claus H 1987aPhys. Rev. B36 7151
Umezawa A, Crabtree G W, Liu J Z, Moran T J, Malik S K, Nunez L H, Kwok W L and Sowers C H 1987b (preprint)
Wiesniewski A, Baran M, Przyslupski P, Szymczak H, Pajaczkowska A, Pytel B and Pytel K 1988Solid State Commun. 65 577
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Grover, A.K., Radhakrishnamurty, C., Chaddah, P. et al. Measurement and understanding of magnetization in AC and DC fields and the determination of intragrainH c1 in highT c RBa2Cu3O7 superconductors. Pramana - J. Phys. 30, 569–595 (1988). https://doi.org/10.1007/BF02847552
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DOI: https://doi.org/10.1007/BF02847552
Keywords
- High temperature superconductors
- lower critical field
- magnetization curves
- critical currents
- AC methods
- DC methods
- hysteresis loops