Electronic structure and magnetic symmetry in MnTiO sub(3) analyzed by second harmonic generation

Second harmonic generation (SHG) and linear absorbance spectra of MnTiO sub(3) were measured and the 1.88, 2.41, 2.63, and 3.06 eV SHG features were identified as d - d optical transitions from super(6) A sub(1g) to super(4)T sub(1g)( super(4)G), super(4)T sub(2g)( super(4)G), { super(4)E sub(g), su...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-06, Vol.87 (21)
Main Authors: Cherian, Judy G, Tokumoto, Takahisa D, Zhou, Haidong, Choi, Eun Sang, McGill, Stephen A
Format: Article
Language:English
Subjects:
Antiferromagnetism
Condensed matter
Filing
Mathematical analysis
Optical transition
Phases
Second harmonic generation
Spectra
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Summary:Second harmonic generation (SHG) and linear absorbance spectra of MnTiO sub(3) were measured and the 1.88, 2.41, 2.63, and 3.06 eV SHG features were identified as d - d optical transitions from super(6) A sub(1g) to super(4)T sub(1g)( super(4)G), super(4)T sub(2g)( super(4)G), { super(4)E sub(g), super(4)A sub(1g)( super(4)G)}, and super(4)E sub(g)( super(4)D), respectively. These zero-phonon transitions were used to calculate the octahedral crystal field splitting energy ( Delta sub(0)) and the Racah parameters B and C. The SHG spectra showed significant distinctions between the antiferromagnetic and the paramagnetic or spin-flop phases. The polarization dependence of the SHG in the spin-flop phase provided optical evidence that the spins canted from the c axis toward the a axis. These distinctions between the three magnetic phases could be useful for mapping 180[degrees] antiferromagnetic domains in MnTiO sub(3).
ISSN:1098-0121
1550-235X