Experimental test of the [ital T][sup 2] law for the Hall angle from [ital T][sub [ital c]] to 500 K in oxygen-reduced YBa[sub 2]Cu[sub 3]O[sub 6+[ital x]] crystals

• Published in: Physical review. B, Condensed matter Vol. 46:21
• Main Authors: Harris, J.M., Yan, Y.F., Ong, N.P.
• Format: Journal Article
• Language: English
• Published: United States 01-12-1992
• Subjects: ALKALINE EARTH METAL COMPOUNDS; AMINES; AMMONIUM COMPOUNDS; BARIUM COMPOUNDS; BARIUM OXIDES; CHALCOGENIDES; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER COMPOUNDS; COPPER OXIDES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; HALL EFFECT; HIGH-TC SUPERCONDUCTORS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUATERNARY COMPOUNDS; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS 665411 > Basic Superconductivity Studies > (1992-); YTTRIUM OXIDES
• ISSN: 0163-1829; 1095-3795
• DOI: 10.1103/PhysRevB.46.14293

In both 90-K'' and 60-K'' YBa[sub 2]Cu[sub 3]O[sub 6+[ital x]] crystals, we find that the [ital T][sup 2] law for the Hall angle, measured with field [bold H][parallel][bold c], remains valid for temperatures [ital T] between [ital T][sub [ital c]] and 500 K. The persistence of power-law behavior over this wide range is not affected by oxygen reduction. In contrast to this anomalous behavior, the Hall coefficient observed with [bold H][perpendicular][bold c] is [ital negative] [ital and] [ital temperature] [ital independent]. Measurements of the in-plane resistivity [rho][sub [ital x][ital x]] to 500 K disclose the existence of a kink temperature [ital T][sub [ital K]] ([similar to]320 K) that separates a high-temperature power-law regime from a low-temperature region in which [rho][sub [ital x][ital x]] displays significant curvature.