Hall effect studies of the mixed and normal states of Y{sub 1-x}Pr{sub x}Ba{sub 2}Cu{sub 3}O{sub 7-delta} (0{le} x {le} 1) and YBa{sub 2}Cu{sub 3}O{sub y} (6.35 {le} y 7) single crystals.

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physica C

DOI:https://doi.org/10.1016/0921-4534(94)91086-3· OSTI ID:937769

Almasan, C C; Han, S H; Yoshiara, K; Buchgeister, M; Gajewski, D A; Herrmann, J; Paulikas, A P; Gu, C; Veal, B W; Maple, M B

Hall effect measurements on single crystal specimens of Y{sub 1-x}Pr{sub x}Ba{sub 2}Cu{sub 3}O{sub 7-{delta}} (0{le} x {le} 1) and YBa{sub 2}Cu{sub 3}O{sub y} (6.35 {le} y {le} 7) revealed a 'negative Hall anomaly' below {Tc}, in the mixed state. For both systems, the depth {Delta} of the negative Hall signal scales with T/{Tc}, while the maximum value of {Delta} decreases monotonically with decreasing {Tc} and vanishes at {Tc} {approx} 68 K. These results show that the sign anomaly is not consistent with models that invoke pinning to explain this effect, and suggest that the negative anomaly could have an intrinsic origin. Hall effect measurements in the normal state of both systems show that the cotangent of the Hall angle can be described by cot{theta}H = AT{sup 2} + B, where A increases linearly with decreasing {Tc} for both systems, while B increases linearly with decreasing {Tc} for Y{sub 1-x}Pr{sub x}Ba{sub 2}Cu{sub 3}O{sub 7-{delta}} and is constant within experimental error for YBa{sub 2}Cu{sub 3}O{sub y}.

• Research Organization: Argonne National Laboratory (ANL)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 937769
• Report Number(s): ANL/MSD/JA-18741
• Journal Information: Physica C, Journal Name: Physica C Journal Issue: 1994 Vol. 235-240; ISSN 0921-4534; ISSN PHYCE6
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
HALL EFFECT
MIXED STATE
MONOCRYSTALS
PRASEODYMIUM OXIDES
TRANSITION TEMPERATURE
YTTRIUM OXIDES