Phys. Rev. B 64, 104514 (2001) [4 pages]Magnetotransport mechanisms in strongly underdoped YBa2Cu3Ox single crystalsReceived 2 April 2001; revised 29 May 2001; published 23 August 2001 We report magnetoresistivity measurements on strongly underdoped YBa2Cu3Ox (x=6.25 and 6.36) single crystals in applied magnetic fields H‖ c axis. We identify two different contributions to both in-plane Δρab/ρab and out-of-plane Δρc/ρc magnetoresistivities. The first contribution has the same sign as the temperature coefficient of the resistivity ∂lnρi/∂T (i={c,ab}). This contribution reflects the incoherent nature of the out-of-plane transport. The second contribution is positive, quadratic in field, with an onset temperature that correlates to the antiferromagnetic ordering. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.104514
DOI:
10.1103/PhysRevB.64.104514
PACS:
74.72.Bk, 74.25.Fy
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