Abstract
We report room-temperature (RT) magnetoresistance (MR) in a novel Fe-based perovskite, SrV0.3Fe0.7O2.8. This compound contains ordered oxygen vacancies in every fifth primitive perovskite (111)p 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, SrV0.3Fe0.7O2.8 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 μB/Fe atom).
| Original language | English |
|---|---|
| Pages (from-to) | 8987-8991 |
| Number of pages | 5 |
| Journal | Inorganic Chemistry |
| Volume | 61 |
| Issue number | 24 |
| DOIs | |
| State | Published - Jun 20 2022 |
Funding
This work was supported by JSPS KAKENHI Grant JP19K22230. This work was also supported by the Project of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The synchrotron XRD experiments were performed at the BL02B2 of SPring-8 with the approval of JASRI (Grants 2020A1646 and 2021B1159). A portion of this research used resources at the Spallation Neutron Source, a Department of Energy, Office of Science User Facility, operated by ORNL. ND measurements was carried out on BL-11A POWGEN at ORNL (Proposal IPTS-26071). ND measurements were also carried out on HERMES at JRR-3 and supported by the JRR-3 general user program managed by the Institute for Solid State Physics, University of Tokyo (Proposal 21571). The Mössbauer spectroscopic study was supported by the Nanotechnology Platform Program of MEXT, Japan.