Nanocrystalline Orthoferrite GdFeO3 from a Novel Heterobimetallic Precursor

Abstract

A single‐step hydrolytic decomposition of a mixed‐metal precursor (see Figure) results in the size‐controlled synthesis of nanocrystalline GdFeO3 particles with high compositional and morphological homogeneity. Owing to the molecular level mixing of the cations and the preformed Gd–O–Fe linkage, the temperature required for the formation of this crystalline orthoferrite phase is much lower than that for a solid‐state synthesis.

Temperature dependent dielectric and magnetic properties of GdFe1−xNixO3 (0.0 ≤ x ≤ 0.3) orthoferrites

“…26 For most of orthoferrites, the weak ferromagnetism is due to the low symmetry of the magnetic unit cell producing canted structure in Fe sub-lattice. Hence, for a better understanding of such magnetic behavior of studied orthoferrites, the magnetization (M) measurements as a function of applied magnetic field (H) have been performed at room temperature (300 K) as well as at 80 K. Figures 8 and 9 represent the isothermal dc magnetization hysteresis (M-H) curves for GdFe 1Àx Ni x O 3 (x ¼ 0.0, 0.1, 0.2, and 0.3) at 300 K and 80 K, respectively.…”

Mechanochemically assisted synthesis of yttrium–lanthanum orthoferrite: Structural and magnetic characterization

“…Even though sample YML3 only contains Y 0.5 La 0.5 FeO 3 , the magnetic response indicates a non-negligible residual magnetic moment, which is not expected for the orthoferrite antiferromagnetic structure. However, it is a well-known effect that in these perovskite structures the antiparallel spin ordering can be altered by the incorporation of A cations of different sizes leading to the tilting of FeO 6 octahedra and spin canting [19]. On the other hand, the mechanosynthesized Y 0.5 La 0.5 FeO 3 phase presents a distorted structure with a large number of defects which contributes to the disordered spin arrangement.…”

Gd(III) doping effect on magnetization and water proton relaxivities in ultra small iron oxide nanoparticles

“…25 However, stoichiometric Gd x Fe y O z oxides such as GdFeO 3 , GdFe 2 O 4 , Gd 3 FeO 6 , and Gd 3 Fe 5 O 12 had been prepared at high temperature syntheses through annealing (>500 • C). 10,11,[26][27][28][29][30][31][32][33][34][35][36][37][38] Therefore, high temperature synthesis should be used to increase Gd(III) doping mole percents.…”