We report room-temperature (RT) magnetoresistance (MR) in a novel Fe-based perovskite, SrVFeO. This compound contains ordered oxygen vacancies in every fifth primitive perovskite (111) plane, leading to a layered structure consisting of triple-octahedral and double-tetrahedral layers. Along with the oxygen vacancies, the transition-metal ions are also ordered: the octahedral sites are occupied by 100% of Fe ions, while the tetrahedral sites are occupied by 25% of Fe ions and 75% of V ions. As a result, SrVFeO forms a magnetically striped lattice in which the octahedral layers with 100% of magnetic Fe ions are separated by the diluted magnetic layer. The compound exhibits weak ferromagnetism and shows a large negative MR (-5% at 3 T) at RT, despite the small saturation moment (0.4 μ/Fe atom). Thus, this type of layered compound is promising for further large MR by an increase of magnetization through chemical substitution.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.inorgchem.2c01137DOI Listing

Publication Analysis

Top Keywords

fe-based perovskite
8
room-temperature magnetoresistance
8
oxygen vacancies
8
sites occupied
8
ions
5
srvfeo vacancy-ordered
4
vacancy-ordered fe-based
4
perovskite exhibiting
4
exhibiting room-temperature
4
magnetoresistance report
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!