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000894442 0247_ $$2doi$$a10.1103/PhysRevB.104.L020403
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000894442 1001_ $$0P:(DE-HGF)0$$aDutta, Rajesh$$b0$$eCorresponding author
000894442 245__ $$aSpin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba 2 CoGe 2 O 7 under external magnetic fields
000894442 260__ $$aWoodbury, NY$$bInst.$$c2021
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000894442 520__ $$aWe report a spin-wave study on multiferroic Ba2CoGe2O7 under magnetic fields up to 12 T using low-energyinelastic neutron scattering. In-plane transverse (T1) spin-wave modes are highly dispersive along (h00) andrather flat but strong in intensity along (30l). In addition, two dispersive electromagnon modes have beenobserved around 3.5 meV. Dispersion of the out-of-plane transverse modes (T2) under fields reveals that thesingle-ion anisotropy constant decreases with increasing magnetic field, which is consistent with the linearspin-wave theory. Our results imply that the field-dependent single-ion anisotropy plays a crucial role indetermining the characteristics of T2 and electromagnon modes in the three-dimensional anisotropic spin-wavespectrum.
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000894442 7001_ $$0P:(DE-Juel1)176326$$aThoma, Henrik$$b1
000894442 7001_ $$0P:(DE-Juel1)174091$$aRadelytskyi, Igor$$b2
000894442 7001_ $$0P:(DE-Juel1)156579$$aSchneidewind, Astrid$$b3
000894442 7001_ $$0P:(DE-HGF)0$$aKocsis, Vilmos$$b4
000894442 7001_ $$0P:(DE-HGF)0$$aTokunaga, Yusuke$$b5
000894442 7001_ $$00000-0003-1896-699X$$aTaguchi, Yasujiro$$b6
000894442 7001_ $$0P:(DE-HGF)0$$aTokura, Yoshinori$$b7
000894442 7001_ $$0P:(DE-Juel1)164298$$aHutanu, Vladimir$$b8
000894442 773__ $$0PERI:(DE-600)2844160-6$$a10.1103/PhysRevB.104.L020403$$gVol. 104, no. 2, p. L020403$$n2$$pL020403$$tPhysical review / B$$v104$$x2469-9969$$y2021
000894442 8564_ $$uhttps://juser.fz-juelich.de/record/894442/files/PhysRevB.104.L020403.pdf$$yOpenAccess
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