Ab Initio Cycloidal and Chiral Magnetoelectric Responses in Cr${}_2$O${}_3$

Abstract

We present a thorough density functional theory study of the magneto-electric (ME) effect in Cr${}_2$O${}_3$. The spin-lattice ME tensor $\alpha$ was determined in the low-field and spin flop (SF) phases, using the method of dynamical magnetic charges, and found to be the sum of three distinct components. Two of them, a large relativistic "cycloidal" term and a small longitudinal term, are independent on the spin orientation. The third, only active in the SF phases is also of relativistic origin and arises from magnetic-field-induced chirality, leading to a non-toroidal ME response.

5 pages with 2 figures, 2 pages supplementary material

References in corpus (3)

• Spin current and magneto-electric effect in non-collinear magnets
• Full magnetoelectric response of Cr2O3 from first principles
• Dynamical magnetic charges and linear magnetoelectricity

Cited by in corpus (2)

• Density functional perturbation theory within non-collinear magnetism
• Linear magnetoelectricity in the Zintl phase pnictides (Ba, Ca, Sr)${\mathrm{Mn}}_2{(\mathrm{P},\mathrm{As},\mathrm{Sb})}_2$ from first principles calculations