Distinct Fe-induced magnetic states in the underdoped and overdoped regimes of La2-xSrxCu1-yFeyO4 revealed by muon spin relaxation

Abstract

Zero-field and longitudinal-field muon-spin-relaxation measurements have been performed in partially Fe-substituted La2-xSrxCu1-yFeyO4 in a wide range of hole concentration, to investigate the magnetic state induced by the Fe substitution recently suggested from the neutron-scattering measurements [Phys. Rev. Lett. 107, 127002 (2011)]. It has been found that the magnetic transition temperature is notably enhanced through the 1% Fe substitution in a wide range of hole concentration where superconductivity appears in Fe-free La2-xSrxCuO4. In the underdoped regime, the Fe-induced magnetic order can be understood in terms of the concept of stripe pinning by Fe as in the case of the Zn-induced one in La2-xSrxCu1-yZnyO4. In the overdoped regime, on the other hand, the Fe-induced magnetic order is short-ranged, which is distinct from the stripes. It is plausible that a spin-glass state of Fe spins derived from the Ruderman-Kittel-Kasuya-Yosida interaction is realized in the overdoped regime, suggesting a change of the ground state from the strongly correlated state to the Fermi-liquid state with hole doping in La-214 high-Tc cuprates.

10 pages, 6 figures, accepted for publication in Phys. Rev. B

References in corpus (10)

• Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field
• Testing the itinerancy of spin dynamics in superconducting Bi2212
• Cu-spin dynamics in the overdoped regime of La_2-x_Sr_x_Cu_1-y_Zn_y_O_4_ probed by muon spin relaxation
• Effects of Zn and Ni substitution on the Cu-spin dynamics and superconductivity in La_2-x_Sr_x_Cu_1-y_(Zn,Ni)_y_O_4_ with x=0.15-0.20 studied by the muon spin relaxation and magnetic susceptibility
• Magnetic-field-induced enhancement of the vortex pinning in the overdoped regime of La${}_{2-x}$Sr${}_x$CuO${}_4$ : Relation to the microscopic phase separation
• Similarity between Ni and Zn impurity effects on the superconductivity and Cu-spin correlation in La2-xSrxCu1-yNiyO4 high-Tc cuprates: A comparison based on the hole trapping by Ni
• Field-induced magnetic order in La$sub2-x$Sr$subx$CuO$sub4$ (x = 0.10, 0.115, 0.13) studied by in-plane thermal conductivity measurements
• Development of Cu-spin correlation in Bi_1.74_Pb_0.38_Sr_1.88_Cu_1-y_Zn_y_O_6+d_ high-temperature superconductors observed by muon spin relaxation
• Magnetic field effect on Fe-induced short-range magnetic correlation and electrical conductivity in Bi${}_{1.75}$Pb${}_{0.35}$Sr${}_{1.90}$Cu${}_{0.91}$Fe${}_{0.09}$O${}_{6+y}$
• Enhancement of electronic anomalies in iron-substituted La_2-x_Sr_x_Cu_1-y_Fe_y_O_4_ around x=0.22

Cited by in corpus (4)

• Two-dimensional superconducting fluctuations associated with charge density wave stripes in La${}_{1.87}$Sr${}_{0.13}$Cu${}_{0.99}$Fe${}_{0.01}$O${}_4$
• Successive magnetic transitions relating to itinerant spins and localized Cu spins in La2-xSrxCu1-yFeyO4: Possible existence of stripe correlations in the overdoped regime
• Incommensurate Antiferromagnetic Order in the Fe-substituted Bi-2201 Cuprate in the Heavily Overdoped Regime
• Observation of Subharmonic Charge-Density-Wave Correlations in La-Based Cuprates