High temperature Faraday balance for in situ measurement of magnetization in transition metal oxides

Abstract

We report the design of a Faraday balance that can be used to measure the magnetization of transition metal oxides at high temperatures and under controlled atmosphere. The instrument is sufficiently sensitive and stable to quantify the magnetic force on diamagnetic and paramagnetic samples at temperatures up to 1000 degrees C and in oxygen partial pressures as low as 100 ppm. We demonstrate the performance of the instrument by presenting preliminary magnetic measurements of lanthanum strontium cobalt oxide (La1-xSr(x)CoO3-delta) and aluminum oxide (Al2O3).

Evolution of conductivity, structure and thermochemical stability of lanthanum manganese iron nickelate perovskites

“…The magnetic susceptibility measurements were performed in a field of 0.0035 T using a magnet with the NETZSCH TG 209 instrument. 16 The effect of buoyancy was corrected by blank runs with an alumina crucible under corresponding gas atmospheres.…”

High Temperature Magnetic Properties of Sr-Doped Lanthanum Cobalt Oxide (La1−xSrxCoO3−δ)

“…High temperature magnetic force measurements were carried out using a Faraday magnetometer, as described previously . Measurements were made at a uniform magnetic field of 5 T and a gradient field of 1000 Gauss/inch.…”

A Novel Approach for Quantifying Magnetic Susceptibility of Aqueous and Organic Solutions

“…By carefully measuring the displacement of the sample within the magnetic field, Gouy’s method allows for the determination of the magnetic susceptibility. Analogous varieties of Gouy’s balance are the Faraday balance − and the Evans balance. , …”