Thermoelectric Power of YBa2Cu3O7-Xand YBa2Cu4O8Under Pressure | Zendy

S. Ramasesha | Zendy

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Thermoelectric Power of YBa₂Cu₃O_7-Xand YBa₂Cu₄O₈Under Pressure

Author(s) -

S. Ramasesha

Publication year - 1992

Publication title -

active and passive electronic components

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.144

H-Index - 22

eISSN - 1026-7034

pISSN - 0882-7516

DOI - 10.1155/1993/32872

Subject(s) - seebeck coefficient , materials science , thermoelectric effect , high temperature superconductivity , electrical resistivity and conductivity , analytical chemistry (journal) , superconductivity , mineralogy , electrical engineering , condensed matter physics , chemistry , physics , thermodynamics , engineering , chromatography

Thermoelectric power (TEP) of YBa2Cu3O7-X (123) and YBa2Cu4O8 (124) samples are measured as a function of pressure. The TEP of an as-sintered 123 polycrystalline sample shows a broad maximum around 1.25 GPa whereas that of the cold-pressed sample decreases steadily. The ab-plane TEP of 123single crystal decreases monotonically and the c-axis TEP exhibits a maximum around 1.5 GPa. Disappearanceof the broad maximum in the polycrystalline sample upon cold-pressing is interpreted interms of the crystallite orientation occurring under pressure. TEP of the 124 polycrystalline sampledecreases sharply up to 4.5 GPa and at a lower rate with further increase in pressure, a trend similarto that is observed in the variation of Tc as a function of pressure

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