Temperature dependence of spin wave modes in multiferroic cupric oxide
The objective is to follow the temperature evolution of the acoustic and optic magnon modes at the magnetic zone centre in CuO. Measurements will be made throughout the collinear antiferromagnetic phase (T < 213K) and into the helical phase (213 < T < 230K). We shall use longitudinal polarization analysis to identify modes from different spin components, and to separate spin wave scattering from optic phonons. With these systematic measurements we hope to be able to interpret the complex spectrum in the helical phase, and thus identify the interactions which (i) stabilize the helix at high temperatures, and (ii) stabilize the collinear antiferromagnet at low temperatures.
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BOOTHROYD Andrew Timothy; BOURDAROT Frederic; Viviane Peçanha Antonio and Siobhan M. Tobin. (2021). Temperature dependence of spin wave modes in multiferroic cupric oxide. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1712
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