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Resistive dissipation in imperfect crystals of YBa2Cu3O7−δ (1990)

Kwok, W. K. ; Welp, U. ; Vandervoort, K. G. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 57 (1990), S. 1268-1271

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: We have measured ac magnetoresistance in fields up to 8 T in a variety of YBa2Cu3O7−δ single crystals containing (a) twin boundaries only in one direction, (b) multi-twin domain structure, and (c) growth steps. We find two components of the resistance: an angular dependent Lorentz force induced "excess resistivity'' superimposed on an angular independent resistivity. The temperature and magnetic field dependence of the angular-dependent resistivity exhibit a strong correlation with crystal defects, whereas the angular-independent resistivity remains virtually unchanged. In addition, we find crystals exhibiting both ohmic and non-ohmic behavior in their I-V characteristics depending on crystal imperfections.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.103458

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