Effect of spin ordering on the magnetotransport ofYBa2Cu3O6.25

Magnetic phase transitions and bulk spin-valve effect tuned by in-plane field orientation in Ca3Ru2OFobes1, Jin2, Qu3 et al. 2011Phys. Rev. B10190View full textAdd to dashboardCite

“…Such anisotropy can be attributed to Ising-type anisotropy, which is often observed in other magnetic systems with Ising-type anisotropy. [26][27][28][29] . Isingtype anisotropy is also observed in ρ c (B, φ) when the initial state is AFM-a (see Fig.…”

Antiferromagnetic domain walls in lightly doped layered cuprates

“…This magnetoelastic coupling is expected to be rather small in the cuprates, leading to a change in lattice constant of order 3 10 −5 −10 −6 . In principle ESR analysis can detect the resulting change in crystal field 4 , however, the effect seems too weak in the case AF Y Ba 2 Cu 3 O 6 .…”

Magnetostriction and Magnetostructural Domains in AntiferromagneticYBa2Cu3O6Náfrádi1, Keller2, Hardy3 et al. 2016Phys. Rev. Lett.170110View full textAdd to dashboardCite

“…In particular, an anomalous magnetoresistance has been reported for lightly doped, antiferromagnetic YBa 2 Cu 3 O 6+δ , [12,13] a material that has served as a model compound for recent research on high-temperature superconductivity [2]. The magnetoresistance in the CuO 2 -planes was found to exhibit a "dwave" symmetry upon rotation of the magnetic field in this plane, that is, the resistance increases (decreases) when the magnetic field is parallel (perpendicular) to the current flow [12,13]. This finding was unexpected, because at low doping levels the crystal lattice is believed to be tetragonal [16].…”

“…Although the atomic-scale spin correlations of undoped cuprates are well understood, there is little direct information on antiferromagnetic domain structures and associated lattice strains, despite indications that they profoundly affect the charge [12,13] and heat [14,15] transport properties and may act as seeds for mesoscopic inhomogeneities in doped compounds [2,6]. In particular, an anomalous magnetoresistance has been reported for lightly doped, antiferromagnetic YBa 2 Cu 3 O 6+δ , [12,13] a material that has served as a model compound for recent research on high-temperature superconductivity [2]. The magnetoresistance in the CuO 2 -planes was found to exhibit a "dwave" symmetry upon rotation of the magnetic field in this plane, that is, the resistance increases (decreases) when the magnetic field is parallel (perpendicular) to the current flow [12,13].…”

“…An alternative model [13,[17][18][19][20] invokes antiferromagnetic domains that are accompanied by a small orthorhombic lattice distortion due to magnetostriction and are reoriented by the magnetic field. The orthorhombic distortion was estimated [13] as a/b − 1 ∼ 6 × 10 −6 , a value too small to be directly observed by x-ray or neutron diffraction techniques. Likewise, direct evidence of the purported charge-stripe or magneto-elastic domains has thus far not been reported for undoped and lightly doped YBa 2 Cu 3 O 6+δ .…”