Pisarev R V, Sänger I, Petrakovskii G A, Fiebig M
Ioffe Physical Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg, Russia.
Phys Rev Lett. 2004 Jul 16;93(3):037204. doi: 10.1103/PhysRevLett.93.037204. Epub 2004 Jul 15.
Three types of optical magnetic-field induced second harmonic (MFISH) generation are observed in CuB2O4. Unusually sharp and intense electronic transitions in MFISH and linear absorption spectra provide selective access to the two nonequivalent Cu2+ sublattices. The magnetic phase diagram for both sublattices is determined by MFISH. Magnetic structure is dominated by antiferromagnetic order at the 4b site. Sublattice interactions transfer it to the 8d site where it coexists with a discoupled paramagnetic component.
在CuB₂O₄中观察到三种类型的光磁场诱导二次谐波（MFISH）产生。MFISH和线性吸收光谱中异常尖锐且强烈的电子跃迁提供了对两个不等价Cu²⁺亚晶格的选择性访问。两个亚晶格的磁相图由MFISH确定。磁结构在4b位点以反铁磁序为主导。亚晶格相互作用将其转移到8d位点，在那里它与解耦的顺磁成分共存。
