Unconventional Multiferroicity in Cupric Oxide
msra(2011)
摘要
The magnetic phase transitions reported below 230 K in cupric oxide are
analyzed theoretically at the macroscopic and microscopic levels. The
incommensurate multiferroic and lock-in commensurate phases are shown to
realize an inverted sequence of symmetry-breaking mechanisms with respect to
the usual sequence occurring in low temperature multiferroic compounds. The
higher temperature spin-spiral phase results from coupled order-parameters
which decouple at the lock-in transition to the commensurate ground state
phase. Expressing the order-parameters in function of the magnetic spins allows
determining the symmetries and magnetic structures of the equilibrium phases
and the microscopic interactions which give rise to the polarization.
更多查看译文
关键词
magnetic structure,ground state,symmetry breaking,materials science
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要