2000/04/30 by I. Tsukada, J. Takeya, Takatsugu Masuda +2 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.62.r6061
10 pages, 4 figures
arxiv created 2000/07/21 · openalex publication_date 2000/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Weak ferromagnetism of quasi-one-dimensional S=(1)/(2) antiferromagnet BaCu2Ge2O7 is studied by the magnetization measurement. The spontaneous magnetization appears along the b axis below 8.8 K. The local symmetry between the intrachain nearest-neighbor spins allows the presence of the Dzyaloshinskii-Moriya interaction, and the only possible spatial configuration of the weak ferromagnetic moment per spin definitely determines the sign of the interchain interaction. A weak a-axis magnetic field can change the direction of the magnetization to the a-axis direction, which shows that the spin chain forms a weakly coupled weak-ferromagnetic chain system.