Complex magnetic properties in the mixed double perovskite iridates
- Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany). Institut für Festkörperphysik
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany). Institut für Festkörperphysik; Technische Univ. Dresden (TUD), Dresden (Germany). Institut für Festkörperphysik
- Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany). Institut für Festkörperphysik; Technische Univ. Dresden (TUD), Dresden (Germany). Institut für Festkörperphysik
Here in this paper, we report on the synthesis and magnetic properties of a series of double perovskites Ln2ZnIrO6 with Ln = Nd, Sm, Eu, Gd. These compounds present examples of the rare case of double perovskites (general formula A2BB'O6) with a magnetic 4ƒ-ion on the A site in combination with the strongly spin-orbit coupled 5d transition-metal ion Ir4+ on the B sublattice. We discuss the impact of different rare earths on the macroscopic magnetic properties. Gd2ZnIrO6 and Eu2ZnIrO6 show ferrimagnetic or canted antiferromagnetic order below TN = 23 and 12 K, respectively. Sm2ZnIrO6 orders antiferromagnetically at TN = 13 K. Nd2ZnIrO6 exhibits more complex magnetic properties with a strong field dependence ranging from a two-step spin reorientation at μ0H = 0.01 T to an antiferromagnetic ground state at intermediate external fields to a spin-flop phase for 0H ≥ 4 T. This unique behavior suggests an interesting interplay between Nd3+ and Ir4+. To further shed light on the relevant magnetic interaction, the zero-field magnetic ground state of Nd2ZnIrO6 is examined via neutron powder diffraction. In general, the magnetic properties of Ln2ZnIrO6 hint towards a substantial contribution of the rare-earth ions and a significant correlation between 5d and 4ƒ magnetism.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1694395
- Journal Information:
- Physical Review Materials, Vol. 4, Issue 5; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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