Modulation of the ferromagnetic insulating phase in Pr0.8Ca0.2MnO3 by Co substitution

Abstract

Ferromagnetic insulator Pr0.8Ca0.2Mn1-yCoyO3 (0 <= y <= 0.7) thin films were epitaxially grown on (LaAlO3)0.3-(SrAl0.5Ta0.5O3)0.7 (100) substrates by pulsed laser deposition. To probe the ferromagnetic insulator state of hole-doped manganites, the Co content dependences of the structural, magnetic, and transport properties were studied. Variation of lattice constant by the substitution of Co ions is well reproduced considering that divalent and trivalent Co ions substitute for Mn ions at the perovskite B-sites. For 0 <= y <= 0.3, the Curie temperature, saturation magnetization, and magnetoresistance increase with increasing Co content, retaining the insulating properties. Detailed analyses of transport and magnetic properties indicate the contribution of both double exchange and superexchange interactions to the appearance of the ferromagnetic insulating phase.

3 pages, 3 figures

References in corpus (6)

• Oxide spintronics
• X-ray Resonant Scattering Studies of Orbital and Charge Ordering in Pr${}_{1-x}$Ca${}_x$MnO${}_3$
• Transport and Magnetic Studies on the Spin State Transition of Pr1-xCaxCoO3 up to High Pressure
• Orbital polarons and ferromagnetic insulators in manganites
• Competition between ferromagnetic and charge-orbital ordered phases in Pr${}_{1-x}$Ca${}_x$MnO${}_3$ for $x$=1/4, 3/8, and 1/2
• Tailoring of ferromagnetic Pr0.85Ca0.15MnO3/ferroelectric Ba0.6Sr0.4TiO3 superlattices for multiferroic properties

Cited by in corpus (2)

• Spin-filter tunnel junction with matched Fermi surfaces
• Spectroscopic studies on the electronic and magnetic states of Co-doped perovskite manganite Pr0.8Ca0.2Mn1-yCoyO3 thin films