Weak ferromagnetism of La_{1.99}Sr_{0.01}CuO_4 thin films: evidence for removal of corrugation in CuO_2 plane by epitaxial strain

Abstract

The weak ferromagnetism of La_{1.99}Sr_{0.01}CuO_4 epitaxial thin films is investigated using magnetoresistance measurement. While a steplike negative magnetoresistance associated with the weak ferromagnetic transition is clearly observed in the films grown on YAlO_3(001), it is notably suppressed in the films grown on SrTiO_3(100) and (LaAlO_3)_{0.3}(SrAl_{0.5}Ta_{0.5}O_3)_{0.7}(100), and almost disappears in films grown on LaSrAlO_4(001). The strong suppression of the steplike magnetoresistance provides evidence that the CuO_2 planes are much less corrugated in thin films grown on tetragonal substrates, particularly on LaSrAlO_4(001), than in bulk crystals.

6 pages, 6 figures, to be published in Physical Review B

References in corpus (1)

• Normal-state conductivity in underdoped La_{2-x}Sr_xCuO_4 thin films: Search for nonlinear effects related to collective stripe motion

Cited by in corpus (4)

• Negative Hall coefficients of heavily overdoped La2-xSrxCuO4
• Critical microwave-conductivity fluctuations across the phase diagram of superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$ thin films
• Superconducting Fluctuation investigated by THz Conductivity of La${}_{2-x}$Sr${}_x$CuO${}_4$ Thin Films
• Static Friction as a Function of Waiting Time Probed by Dynamics of Driven Vortices in La2-xSrxCuO4 Thin Films