Generation and mobility of electronic charge carriers in Y[sub 1]Ba[sub 2]Cu[sub 3]O[sub x]

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04560.x· OSTI ID:6587948

Yoo, H I; Lee, S M ^[1]

---

1. Seoul National Univ., Seoul (Korea, Republic of). Dept. of Inorganic Materials Engineering

The Hall effect and the conductivity of Y[sub 1]Ba[sub 2]Cu[sub 3]O[sub x] have been measured together for quenched specimens at room temperature as functions of oxygen content (x) in the range of 6 < x < 7. It has bene reconfirmed that a hole is generated per every oxygen atom incorporated in the orthorhombic phase (x > 6.5) and per every two oxygen atoms in the tetragonal phase (x < 6.5). The exothermic enthalpy change for hole generation is 2 times or more larger in the tetragonal than in the orthorhombic phase. The mobility of the majority carrier holes has been found to vary discontinuously crossing the phase boundary (x [approx equal] 6.5), reflecting a first-order phase transition for these quenched specimens. It is independent of oxygen content in each structure: 0.34 [+-] 0.03 cm[sup 2]/(V[center dot]s) in the tetragonal phase and 0.51 [+-] 0.06 cm[sup 2]/(V[center dot]s) in the orthorhombic phase.

• OSTI ID: 6587948
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 77:12; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ELECTRIC CONDUCTIVITY
HALL EFFECT
COPPER OXIDES
YTTRIUM OXIDES
CARRIER MOBILITY
CRYSTAL STRUCTURE
OXYGEN ADDITIONS
SAMPLE PREPARATION
SUPERCONDUCTIVITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
MOBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
&amp; Refractories- Physical Properties