K. D. Truong

Magnetodielectric effect in double perovskite La2CoMnO6 thin films

We report on the magnetodielectric properties of well-ordered epitaxial La2CoMnO6 films. The temperature dependence of the dielectric constant is measured in the 10–105Hz frequency range under applied magnetic fields up to 50kOe. As temperature is lowered, the dielectric constant decreases in the ferromagnetic regime and approaches a plateau below 100K. A significant enhancement in the dielectric constant under applied magnetic field is observed only in the ferromagnetic phase regime culminating around the transition temperature, while it is absent in the paramagnetic phase regime. Using Arrott plots, we also demonstrate that these films exhibit a second-order phase transition at their Curie temperature. The observed magnetodielectric characteristics of the films are interpreted using the phenomenological theory.

Long-range Ni/Mn structural order in epitaxial double perovskite La 2 NiMnO 6 thin films

We report and compare the structural, the magnetic, and the optical properties of ordered

Mott transition, compressibility divergence, and the P-T phase diagram of layered organic superconductors: an ultrasonic investigation.

{\text{La}}_{2}{\text{NiMnO}}_{6}

Evidence of bidomain structure in double-perovskite La2CoMnO6 thin films

thin films and its disordered

Influence of Ni/Mn cation order on the spin-phonon coupling in multifunctional La 2 NiMnO 6 epitaxial films by polarized Raman spectroscopy

{\text{LaNi}}_{0.5}{\text{Mn}}_{0.5}{\text{O}}_{3}

Raman scattering study of delafossite magnetoelectric multiferroic compounds: CuFeO2 and CuCrO2

counterpart. An x-ray diffraction (XRD) study reveals that the

Multiferroic double perovskites: Opportunities, issues, and challenges

B

Growth, magnetic properties, and Raman scattering of La2NiMnO6 single crystals

-site Ni/Mn ordering induces additional XRD reflections as the crystal symmetry is transformed from a pseudocubic perovskite unit cell in the disordered phase to a monoclinic form with larger lattice parameters for the ordered phase. Polarized Raman-spectroscopy studies reveal that the ordered samples are characterized by additional phonon excitations that are absent in the disordered phase. The appearance of these additional phonon excitations is interpreted as the clearest signature of Brillouin-zone folding as a result of the long-range Ni/Mn ordering in

Anomalously large ferromagnetic Curie temperature of epitaxial Bi2CoMnO6 thin films

{\text{La}}_{2}{\text{NiMnO}}_{6}

Elastic study of antiferromagnetic fluctuations in the layered organic superconductorsκ−(BEDT−TTF)2X

. Both ordered and disordered materials display a single ferromagnetic-to-paramagnetic transition. The ordered films display also a saturation magnetization close to