Coexistence of superconductivity and ferromagnetism in a dilute cobalt-doped La1.89Ce0.11CuO4 +/-delta system

  title={Coexistence of superconductivity and ferromagnetism in a dilute cobalt-doped La1.89Ce0.11CuO4 +/-delta system},
  author={Kuijuan Jin and J Yuan and L. H. Zhao and H. Wu and X. Y. Qi and Beiyi Zhu and Lixin Cao and X. G. Qiu and B. Xu and X. F. Duan and B. R. Zhao},
  journal={Physical Review B},
Thin films of the optimally electron-doped T-'-phase superconductor La1.89Ce0.11CuO4 +/-delta are investigated by dilute Co doping, forming La1.89Ce0.11(Cu1-xCox)O-4 +/-delta (LCCCO) with x=0.01-0.05. The following results are obtained: for the whole dilute Co doping range, LCCCO thin films show long-range ferromagnetic ordering in the temperature range from 5 to 300 K, which is likely due to the Ruderman-Kittel-Kasuya-Yosida interaction; for very dilute Co doping, x=0.01 and 0.02, the… Expand
11 Citations
Evolution of charge carriers for transport in electron-doped cuprate superconductor La1.89Ce0.11CuO4 thin films
Sr0.35CoO2 and Ca0.38CoO2 single crystals have been successfully prepared by a low-temperature ion exchange of layered NaxCoO2 precursors. Both samples are isostructural to NaxCoO2 with the layeredExpand
Magnetic cobalt-ion substitution effect in electron-doped La1.89Ce0.11CuO4 superconductor
We investigate the in-plane transport and magnetic properties of La1.89Ce0.11(Cu1-xCox)O-4 thin films with x = 0.01-0.05. With increasing Co concentration, T-c is obviously suppressed and a crossoverExpand
Coexistence of Superconductivity and Ferromagnetism in La2-xSrxCuO4 Nanoparticles
Magnetic and superconducting properties of La2-xSrxCuO4 nanoparticles are systematically studied as a function of particle size and Sr doping. Through the magnetization and electron spin resonanceExpand
Low temperature transport of electron-doped superconductor La2−xCexCuO4 thin films
Abstract The Hall effect study has been performed to examine the nature of quasi-particles of electron-doped superconductor, T′-phase La2−xCexCuO4 (LCCO) thin films with 0.06 ⩽ x ⩽ 0.17 , for whichExpand
Dielectric functions of La-based cuprate superconductors for visible and near-infrared wavelengths
Abstract The highly c-axis oriented La 1.9 Ce 0.1 CuO 4 (LCCO) film was prepared on SrTiO 3 (STO) substrate by pulsed-laser deposition (PLD). The identification and characterization of the LCCO filmExpand
Sign reversal of the Hall resistance in the mixed-state of La1.89Ce0.11CuO4 and La1.89Ce0.11(Cu0.99Co0.01)O4 thin films
The transport properties of La1.89Ce0.11CuO4(LCCO) and La1.89Ce0.11(Cu0.99Co0.01)O-4 (LCCO:Co) superconducting thin films are investigated. When the external field H is applied along theExpand
Evolution of electronic states in n-type copper oxide superconductor via electric double layer gating
The occurrence of electrons and holes in n-type copper oxides has been achieved by chemical doping, pressure, and/or deoxygenation. However, the observed electronic properties are blurred by theExpand
Underdoped electron-doped La2-xCexCuO4 (x=0.06-0.09) thin films were successfully grown and investigated for the transport properties in ab-plane. It was found that the in-plane resistivity ρab showsExpand
Transport anomalies and quantum criticality in electron-doped cuprate superconductors
Superconductivity research is like running a marathon. Three decades after the discovery of high-Tc cuprates, there have been mass data generated from transport measurements, which bring fruitfulExpand
Research trends in electron-doped cuprate superconductors
In this review, we look back on some intriguing and puzzling issues in electron-doped cuprate superconductors, such as electron- hole asymmetry, two types of carriers, quantum critical points,Expand


Coexistence of superconductivity and ferromagnetism in the d-band metal ZrZn2
The observation of superconductivity in the ferromagnetically ordered phase of the d-electron compound ZrZn2 suggests that metallic ferromagnets may universally become superconducting when the magnetization is small. Expand
Superconductivity on the border of itinerant-electron ferromagnetism in UGe2
The observation of superconductivity on the border of ferromagnetism in a pure system, UGe 2, which is known to be qualitatively similar to the classic d-electron ferromagnets, is reported. Expand
Doping dependence of an n-type cuprate superconductor investigated by angle-resolved photoemission spectroscopy.
Light is shed on the Mott gap, its doping evolution, as well as the anomalous transport properties of the n-type cuprates, and in Nd2CuO4, the charge-transfer band is revealed for the first time. Expand
Evolution of superconductivity in electron-doped cuprates : Magneto-Raman spectroscopy
The electron-doped cuprates Pr_{2-x}Ce_xCuO_4 and Nd_{2-x}Ce_xCuO_4 have been studied by electronic Raman spectroscopy across the entire region of the superconducting (SC) phase diagram. The SCExpand
Transport properties of electron-doped La2- xCexCuO4 cuprate thin films
Electron-doped La2-xCexCuO4 (x=0.06-0.20) thin films with two orientations (100) and (103) were successfully grown and their transport properties were investigated. It is found that the temperatureExpand
Coexistence of superconductivity and ferromagnetism in URhGe
It is shown that the ferromagnet URhGe is superconducting at ambient pressure, and the thermodynamic signature of the transition is found—its form is consistent with asuperconducting pairing of a spin-triplet type, although further testing with cleaner samples is needed to confirm this. Expand
Strongly correlated s-wave superconductivity in the N-type infinite-layer cuprate.
Quasiparticle tunneling spectra of the electron-doped ( n-type) infinite-layer cuprate Sr0.9La0.1CuO2 reveal characteristics that counter a number of common phenomena in the hole-doping cuprates, and the response to quantum impurities in the Cu sites differs fundamentally from that of the p-type cuprates with d(x(2)-y(2))-wave pairing symmetry. Expand
Anomalous temperature dependence of spin susceptibility around a nonmagnetic impurity in high-Tc cuprate superconductors
Local magnetic properties around a nonmagnetic impurity are investigated in the superconducting state of high-T c cuprates. We consider a model two-dimensional d x 2 - y 2 -wave superconductor withExpand
High temperature ferromagnetism with a giant magnetic moment in transparent co-doped SnO(2-delta).
The occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn(1-x)Co(x)O(2-delta) (x<0.3) and a giant magnetic moment of 7.5+/-0.5 micro(B)/Co, not yet reported in any diluted magnetic semiconductor system. Expand
Superparamagnetic behavior in Nd2-xCexCu(57Co)O4.
2D magnetic order in the electron-doped system is much stronger than that in hole-doping systems, with extremely long-lived (>10 -8 s) spin correlations far above the 3D Neel temperature. Expand