ORCID Profile
0000-0002-5768-121X
Current Organisation
Daegu Gyeongbuk Institute of Science and Technology (DGIST)
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 03-1990
Publisher: Royal Society of Chemistry (RSC)
Date: 1989
DOI: 10.1039/DT9890002335
Publisher: Informa UK Limited
Date: 15-12-1991
Publisher: Informa UK Limited
Date: 03-1995
Publisher: IOP Publishing
Date: 11-1992
DOI: 10.1143/JJAP.31.3649
Abstract: A new cubic perovskite, (SrLa)(MgMn)O 6- x , has been prepared under the reaction conditions of high temperature (900°C) and high oxygen pressure (60 kbar). The latter condition was generated by in situ thermal decomposition of KClO 3 in a belt-type apparatus. The X-ray diffraction pattern shows that Mg and Mn ions are distributed randomly in the B-site of the cubic perovskite with the lattice constants of 3.873(3) Å. Redox titration and thermogravimetric analysis were carried out to determine the average oxidation state of manganese ions, and/or the content of oxygen deficiency that was deduced as x \\cong0.38(2). Electron spin resonance spectra and magnetic susceptibility measurements indicate a weak ferromagnetic coupling due to the superexchange interaction between t 2g orbital electrons of Mn(IV) and Mn(V).
Publisher: IOP Publishing
Date: 10-1993
DOI: 10.1143/JJAP.32.4628
Abstract: According to the Rietveld refinement, the perovskite-related Ba 2 CrTaO 6 was found to have a P 6 3 /mmc space group with lattice constants of a =5.7383(1) and c =18.7832(2) Å. The Cr and Ta ions are completely ordered the face-shared octahedra are occupied by Cr ions and the corner-shared octahedra by Ta ions. The increased covalent bonding nature of (Cr-O-Cr) and/or (Cr-Cr) bonds via π(ε gπ - p π -ε gπ ) and σ( a 1g - a 1g ) would be the main driving force to stabilize the 8-layer hexagonal structure. The existence of such covalent bondings was confirmed by the ESR spectroscopic analysis and magnetic susceptibility measurement. The XANES spectra for Ta LIII-edge indicated that such a covalency induces a relatively weak covalency of competing (Ta-O) bond.
Publisher: Elsevier BV
Date: 08-1994
Location: Korea, Republic of
No related grants have been discovered for Seung-Tae Hong.