Possible magnetic phase separation in Ru-doped La0.67Ca0.33MnO3

Phase separation , thermal history and magnetic behaviour of Sr doped

High-resolution transmission electron microscopy observations and magnetic ac susceptibility measurements have been carried out to study the changes in the magnetic properties of La1−xSrxCoO3 samples (x 0.3) processed at different annealing temperatures, ranging from 1273 to 1573 K. Although neutron diffraction excludes the coexistence of distinct phases with different chemical composition, roo...

Magnetic Phases and Possible Magnetic Pairing in Doped Lanthanum Cuprate

We discuss the temperature-concentration (T-x) phase diagram of La2-x(SrlBa)xCuO4. The magnetic interactions of the hole spins with the Cu spins yield frustration, explaining the fast decrease in the NEel temperature and yielding a new spin glass phase. The same interactions yield a strong attractive hole-hole potential, which can lead to pairing and superconductivity. 1. INTRODUCTION Both La2....

Strain-driven orbital and magnetic orders and phase separation in epitaxial half-doped manganite films

D. Pesquera, A. Barla, M. Wojcik, E. Jedryka, F. Bondino, E. Magnano, S. Nappini, D. Gutiérrez, G. Radaelli, G. Herranz, F. Sánchez and J. Fontcuberta 1 Institut de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain 2 Istituto di Struttura della Materia, ISM CNR, S.S. 14 km 163.5, Area Science Park Basovizza (Ts), Trieste I34149, Italy 3 Polish Academy of Science,...

Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor

Magnetic phase separation in ordered alloys

We present a lattice model to study the equilibrium phase diagram of ordered alloys with one magnetic component that exhibits a low temperature phase separation between paramagnetic and ferromagnetic phases. The model is constructed from the experimental facts observed in Cu32xAlMnx and it includes coupling between configurational and magnetic degrees of freedom that are appropriate for reprodu...