Ferromagnetic/superconducting bilayer structure: A model system for spin diffusion length estimation

Abstract

We report detailed studies on ferromagnet--superconductor bilayer structures. Epitaxial bilayer structures of half metal--colossal magnetoresistive La${}_{2/3}$Ca${}_{1/3}$MnO${}_3$ (HM--CMR) and high--$T_{\mathrm{c}}$ superconducting YBa${}_2$Cu${}_3$O${}_{7-\delta }$(HTSC) are grown on SrTiO${}_3$ (100) single--crystalline substrates using pulsed laser deposition. Magnetization $M$(T) measurements show the coexistence of ferromagnetism and superconductivity in these structures at low temperatures. Using the HM--CMR layer as an electrode for spin polarized electrons, we discuss the role of spin polarized self injection into the HTSC layer. The experimental results are in good agreement with a presented theoretical estimation, where the spin diffusion length ${\xi }_{\mathrm{FM}}$ is found to be in the range of ${\xi }_{\mathrm{FM}}\approx$ 10 nm.

6 pages, 7 figures, Accepted for publication in Phys. Rev. B

References in corpus (7)

• Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State
• Ferromagnetic/superconducting proximity effect in La0.7Ca0.3MnO3 / YBa2Cu3O7 superlattices
• Critical temperature and superfluid density suppression in disordered high-$T_c$ cuprate superconductors
• Proximity induced metal/insulator transition in $YB{a}_{2}C{u}_3{O}_7/L{a}_{2/3}C{a}_{1/3}Mn{O}_3$ superlattices
• Comparison of s- and d-wave gap symmetry in nonequilibrium superconductivity
• Enhancement of flux-line pinning in all-oxide superconductor/ferromagnet heterostructures
• Suppression of Superconductivity in YBCO/LCMO Superlattices

Cited by in corpus (16)

• Electron Doping of Cuprates via Interfaces with Manganites
• Long-range transfer of electron-phonon coupling in oxide superlattices
• Suppressed magnetization in La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$/YBa${}_2$Cu${}_3$O${}_{7-\delta }$ superlattices
• YBa${}_2$Cu${}_3$O${}_7$/La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$ bilayers: Interface coupling and electric transport properties
• In search for the superconducting spin-switch: Magnetization induced resistance switching effects in La${}_{0.67}$Sr${}_{0.33}$MnO${}_3$/YBa${}_2$Cu${}_3$O${}_{7-\delta }$ bi- and trilayers
• Magnetic properties and atomic structure of La(2/3)Ca(1/3)MnO(3)-YBa(2)Cu(3)O(7) heterointerfaces
• Evidence for Induced Magnetization in Superconductor-Ferromagnet Hetero-structures: a Scanning Tunnelling Spectroscopy Study
• Spin-polarized quasiparticle injection effects in YBCO thin films
• Measurement of Magnetic Exchange in Ferromagnet-Superconductor La2/3Ca1/3MnO3/YBa2Cu3O7 Bilayers
• Selective interlayer ferromagnetic coupling between the Cu spins in YBa${}_2$ Cu${}_3$ O${}_{7-x}$ grown on top of La${}_{0.7}$ Ca${}_{0.3}$ MnO${}_3$
• The temperature-dependent magnetization profile across an epitaxial bilayer of ferromagnetic La2/3Ca1/3MnO3 and superconducting YBa2Cu3O7-d
• Spin pumping in d-wave superconductor/ferromagnet hybrids
• Modulation of superconductivity by spin canting in a hybrid antiferromagnet/superconductor oxide
• Structural and electronic properties of epitaxial YBaCuO/LaCaMnO bilayers grown on SrTiO${}_3$ (110) substrates
• Crossover from magnetostatic to exchange coupling in La0.67Ca0.33MnO3/YBa2Cu3O7/La0.67Ca0.33MnO3 heterostructures
• A study of the ferromagnetic transition of $SrRu{O}_3$ in nanometer thick bilayers with $YB{a}_{2}C{u}_3{O}_y$, $L{a}_{1.88}S{r}_{0.12}Cu{O}_{4-y}$, Au and Cr: Signature of injected carriers in the pseudogap regime