Magnetic and dielectric properties in the langasite-type compounds: A(3)BFe(3)D(2)O(14) (A = Ba, Sr, Ca; B = Ta, Nb, Sb; D = Ge, Si)

作者：Marty Karol; Bordet Pierre; Simonet Virginie; Loire Mickael; Ballou Rafik; Darie Celine; Kljun Jakob; Bonville Pierre; Isnard Olivier; Lejay Pascal; Zawilski Bartosz; Simon Charles

来源：Physical Review B, 2010, 81(5): 054416.

DOI：10.1103/PhysRevB.81.054416

The Fe-based langasites are the only reported compounds presenting a magnetic ordering in this rich family, besides being well known for piezoelectric properties and optical activity. The structural, magnetic, and dielectric properties of the Fe-langasite compounds, with various substitution of nonmagnetic cations, have been studied with x-ray and neutron-diffraction, magnetostatic measurements, Mossbauer spectroscopy, and dielectric measurements. The title compounds (trigonal space group P321) display a helical magnetic order with signatures of frustration below T-N approximate to 24-35 K, where an anomaly of the dielectric permittivity is observed. The influence of the cationic substitutions and the nature of the magnetoelectric coupling are hereafter addressed.

• 出版日期2010-2
• 单位中国地震局