Abstract
A very unique paramagnetic defect has been detected by electron paramagnetic resonance (EPR) in -ray irradiated IrO2 single crystals. The unpaired electrons of the defect species were observed to interact with a single Ir nucleus, and the magnetic symmetry is axial. The g? and the g values are very close to those known for Ir2+(5d7) in the low-spin state, but the Fermi contact contribution to the hyperfine splitting is much larger than usual. Moreover, the defect species was found to be preferentially oriented along the a axis (or the b axis, but not both) of the tetragonal rutile lattice. An [Ir-O]0 molecular defect is proposed to account for its EPR properties.
| Original language | English |
|---|---|
| Pages (from-to) | 4281-4288 |
| Number of pages | 8 |
| Journal | Physical Review B |
| Volume | 40 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1989 Jan 1 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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Electron paramagnetic resonance of a molecular defect in -irradiated IrO2 single crystals. / Yu, Jiang-Tsu; Huang, Ying Sheng.
In: Physical Review B, Vol. 40, No. 7, 01.01.1989, p. 4281-4288.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electron paramagnetic resonance of a molecular defect in -irradiated IrO2 single crystals
AU - Yu, Jiang-Tsu
AU - Huang, Ying Sheng
PY - 1989/1/1
Y1 - 1989/1/1
N2 - A very unique paramagnetic defect has been detected by electron paramagnetic resonance (EPR) in -ray irradiated IrO2 single crystals. The unpaired electrons of the defect species were observed to interact with a single Ir nucleus, and the magnetic symmetry is axial. The g? and the g values are very close to those known for Ir2+(5d7) in the low-spin state, but the Fermi contact contribution to the hyperfine splitting is much larger than usual. Moreover, the defect species was found to be preferentially oriented along the a axis (or the b axis, but not both) of the tetragonal rutile lattice. An [Ir-O]0 molecular defect is proposed to account for its EPR properties.
AB - A very unique paramagnetic defect has been detected by electron paramagnetic resonance (EPR) in -ray irradiated IrO2 single crystals. The unpaired electrons of the defect species were observed to interact with a single Ir nucleus, and the magnetic symmetry is axial. The g? and the g values are very close to those known for Ir2+(5d7) in the low-spin state, but the Fermi contact contribution to the hyperfine splitting is much larger than usual. Moreover, the defect species was found to be preferentially oriented along the a axis (or the b axis, but not both) of the tetragonal rutile lattice. An [Ir-O]0 molecular defect is proposed to account for its EPR properties.
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UR - http://www.scopus.com/inward/citedby.url?scp=35949013599&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.40.4281
DO - 10.1103/PhysRevB.40.4281
M3 - Article
AN - SCOPUS:35949013599
VL - 40
SP - 4281
EP - 4288
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 7
ER -