Magnons and electromagnons in the polar helicoidal phase of CuO
Cupric oxide is a high temperature multiferroic. The polar phase is stable between 213 and 230 K, and has a helicoidal magnetic structure. We will measure the magnetic modes in the helicoidal phase at the magnetic zone centre, and we will compare these with the spin wave modes of the low temperature collinear antiferromagnetic phase. We expect to observe spin wave modes characteristic of the magnetic helix together with electromagnons caused by magnetoelectric coupling. Our aim is to elucidate the interactions that stabilise the helicoidal phase and cause the magnetoelectric coupling.
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BOOTHROYD Andrew Timothy; ENDERLE Mechthild and PRINCEP Andrew. (2015). Magnons and electromagnons in the polar helicoidal phase of CuO. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1449
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