Crystal structure and magnetic properties of the BaFe12−In O19 (x=0.1–1.2) solid solutions

Abstract

a b s t r a c tThe investigations of the crystal and magnetic structure by powder neutron diffractometry as well as the magnetic properties by vibration sample magnetometry for the BaFe 12 À x In x O 19 (x ¼0.1-1.2) solid solutions have been performed at different temperatures and magnetic fields. The atomic coordinates and lattice parameters have been Rietveld refined. The Invar effect has been observed in low temperature range (from 150 K to 10 K). It was explained by the thermal oscillation anharmonicity of atoms. The increase of microstress value with decreasing temperature has been defined from Rietveld refinement. The Curie temperature and change of total magnetic moment per formula unit have been defined for all the compositions of the barium hexaferrites BaFe 12 À x In x O 19 (x ¼ 0.1-1.2) solid solutions. The magnetic structure model is proposed. The most likely reasons and the mechanism of magnetic structure formation are discussed.

Investigation into the structural features and microwave absorption of doped barium hexaferrites

“…The X-ray diffraction data correspond to single-phase samples with a hexagonal unit cell crystal structure and P6 3 / mmc space group, agreeing well with previous results obtained earlier for solid solutions with substitution by Al 3+ and In 3+ cations. [37][38][39] The low values of the fitting parameters, such as R wp (3.21-5.42), the weighted profile R-value, R exp (2.41-5.36), the expected R-value, R B (5.42-8.65), the Bragg R-factor and χ 2 (1.52-2.03), the goodness-of-fit quality factor, suggest that the studied sample is of good quality and that the refinements of the X-ray data have been effective. The a and c unit cell parameters are almost linear and they slightly decrease.…”

Synthesis, Crystal Structures and Magnetic Properties of Mononuclear High-Spin Cobalt(II) Complex

“…The analysis of several multinuclear different metal systems that show a slow relaxation of magnetization and magnetic hysteresis below the blocking temperature (TB), without undergoing 3D magnetic ordering, has paramount importance in the area of molecular magnetism that depends upon coordination complexes. One prominent example is iron oxide-based materials that exhibit huge magnetocrystalline anisotropy, high Curie temperature, relatively large magnetization and also have excellent chemical stability and corrosion resistivity as reported by Trukhanov et al [1][2][3][4][5][6][7][8]. These nanomagnets, called SMMs [9], are extremely important for magnetic information storage and quantum computing [10][11][12][13].…”

Investigation of magnetoelectric effect in lead free K0.5Na0.5NbO3-BaFe12O19 novel composite system

“…Substitution of Fe with any diamagnetic cation like In + in BHF can reduce the Curie temperature (T c ) and specific magnetization, thereby facilitating their use in various applications including multiple state memory elements, sensors, transducers, etc. [22,23]. Moreover, a large spontaneous polarization and enhanced multiferroic properties are recently observed in single phase BHF substituted by diamagnetic cations and the magnetoelectric characteristics of M-type hexaferrites synthesized by a modified ceramic technique are found to be more advanced than those obtained for well known room-temperature BiFeO 3 orthoferrite multiferroic [24][25][26][27].…”