Mutual induction of magnetic 3d and 4f order in multiferroic hexagonal ErMnO3

Abstract

The complex interplay between the 3d and 4f moments in hexagonal ErMnO3 is investigated by magnetization, optical second harmonic generation, and neutron-diffraction measurements. We revise the phase diagram and provide a microscopic model for the emergent spin structures with a special focus on the intermediary phase transitions. Our measurements reveal that the 3d exchange between Mn^{3+} ions dominates the magnetic symmetry at 10 K < T < T_N with Mn^3+ order according to the Gamma_4 representation triggering 4f ordering according to the same representation on the Er^{3+}(4b) site. Below 10 K the magnetic order is governed by 4f exchange interactions of Er^{3+} ions on the 2a site. The magnetic Er^{3+}(2a) order according to the representation Gamma_2 induces a magnetic reorientation (Gamma_4 --> Gamma_2) at the Er^{3+}(4b) and the Mn^{3+} sites. Our findings highlight the fundamentally different roles the Mn^{3+}, R^{3+}(2a), and R^{3+}(4b) magnetism play in establishing the magnetic phase diagram of the hexagonal RMnO3 system.

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Cited by in corpus (11)

• Unusual rotating magnetocaloric effect in the hexagonal ErMnO3 single crystal
• Magneto- to electro-active transmutation of spin waves in ErMnO3
• Classification of second harmonic generation effect in magnetically ordered materials
• Axion-matter coupling in multiferroics
• Magnetization, specific heat, and thermal conductivity of hexagonal ErMnO${}_3$ single crystals
• Single crystal growth of the hexagonal manganites $R$MnO${}_3$ ($R$ = rare earth) by the optical floating-zone method
• Asymmetric splitting of an antiferromagnetic resonance via quartic exchange interactions in multiferroic hexagonal HoMnO${}_3$
• Competing exchanges and spin-phonon coupling in Eu1-xRxMnO3 (R=Y,Lu)
• Single-crystal neutron diffraction study of hexagonal YbMnO${}_3$ multiferroic under magnetic field
• h-ErMnO3 absorbance, reflectivity and, emissivity in the THz to mid-infrared from 2 K to 1700 K: carrier screening, Fröhlich resonance, small polarons, and bipolarons
• Room Temperature Dy Spin-Flop Switching in Strained DyFeO3 Thin Films