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Optical second harmonic generation in centrosymmetric antiferro magnetic NiO
被引:2
|作者:
Fiebig, M
[1
]
Fröhlich, D
[1
]
Lottermoser, T
[1
]
Pavlov, VV
[1
]
Pisarev, RV
[1
]
Weber, HJ
[1
]
机构:
[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany
来源:
XI FEOFILOV SYMPOSIUM ON SPECTROSCOPY OF CRYSTALS ACTIVATED BY RARE-EARTH AND TRANSITION METAL IONS
|
2002年
/
4766卷
关键词:
magnetic structure;
nonlinear optics;
second harmonic generation;
centrosymmetry;
NiO;
magneto-optics;
domains;
antiferromagnetism;
transition metals;
D O I:
10.1117/12.475340
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
Optical second harmonic generation (SHG) in NiO in spectroscopy and topography experiments reveals a pronounced signal below the Neel temperature which couples quadratically to the antiferromagnetic order parameter. The SH process originates in combined magnetic-dipole and electric-dipole transitions between the (3d)(8) levels of the Ni2+ ion in the crystal field. It is greatly enhanced by being resonant both in the incoming and the outgoing light waves. The polarization dependence reveals a sensitivity of the SH process to both T and S domains which are investigated in imaging experiments.
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页码:238 / 247
页数:10
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