In:
Journal of the American Ceramic Society, Wiley, Vol. 106, No. 11 ( 2023-11), p. 6778-6786
Abstract:
Magnetic properties in perovskite titanates A TiO 3‐δ ( A = Ca, Sr, Ba) were investigated before and after arc melting. Crystal structure analysis was conducted by powder synchrotron X‐ray diffraction with Rietveld refinements. Quantitative chemical element analysis was carried out by X‐ray photoelectron spectroscopy. Magnetic measurements were conducted by vibrating sample magnetometer and X‐ray magnetic circular dichroism (XMCD). The magnetic properties are found to be affected by impurities of 3d elements such as Fe, Co, and Ni. Depending on the composition and crystal structure, the occupation of the magnetic ions in perovskite titanates is selectively varied, which is interpreted to be the origin of the different magnetic behaviors in arc‐melted perovskite titanates A TiO 3‐δ ( A = Ca, Sr, Ba). In addition, both formation of oxygen vacancies and the reduction of Ti 4+ to Ti 3+ during arc‐melting also play a role as proven by XMCD. Nevertheless, preferential site occupation of magnetic impurities is dominant in the magnetic properties of arc‐melted perovskite A TiO 3‐δ ( A = Ca, Sr, Ba).
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.v106.11
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
