Spin reorientation in antiferromagnetic Dy2FeCoO6 double perovskite

G R Haripriya; T W Heitmann; D K Yadav; G C Kaphle; Madhav Prasad Ghimire; R Pradheesh; J Joshi; P Vora; K Sethupathi; V Sankaranarayanan; H S Nair

doi:10.1088/1361-648X/abaeaa

Spin reorientation in antiferromagnetic Dy₂FeCoO₆ double perovskite

J Phys Condens Matter. 2021 Jan 13;33(2):025802. doi: 10.1088/1361-648X/abaeaa.

Authors

G R Haripriya¹, T W Heitmann², D K Yadav³, G C Kaphle^{3

4}, Madhav Prasad Ghimire^{3

4

5}, R Pradheesh^{1

6}, J Joshi^{7

8}, P Vora^{7

8}, K Sethupathi¹, V Sankaranarayanan¹, H S Nair⁹

Affiliations

¹ Low Temperature Physics Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India.
² University of Missouri Research Reactor, University of Missouri, Columbia, MO 65211, United States of America.
³ Central Department of Physics, Tribhuvan University, Kirtipur, 44613 Kathmandu, Nepal.
⁴ Condensed Matter Physics Research Center (CMPRC), Butwal-11, Rupandehi, Lumbini, Nepal.
⁵ IFW Dresden, Helmholtzstr. 20, D-01069, Dresden, Germany.
⁶ Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
⁷ Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030, United States of America.
⁸ Quantum Materials Center, George Mason University, Fairfax, VA 22030, United States of America.
⁹ Department of Physics, 500 W University Ave, University of Texas at El Paso, El Paso, TX 79968, United States of America.

PMID: 33055379
DOI: 10.1088/1361-648X/abaeaa

Abstract

We explored the electronic and magnetic properties of the lanthanide double perovskite Dy₂FeCoO₆ by combining magnetization, Raman and Mössbauer spectroscopy and neutron diffraction along with density functional theory (DFT) calculations. Our magnetization measurements revealed two magnetic phase transitions in Dy₂FeCoO₆. First, a paramagnetic to antiferromagnetic transition at T _N = 248 K and subsequently, a spin reorientation transition at T _SR = 86 K. In addition, a field-induced magnetic phase transition with a critical field of H _c ≈ 20 kOe is seen at 2 K. Neutron diffraction data suggested cation-disordered orthorhombic structure for Dy₂FeCoO₆ in Pnma space group which is supported by Raman scattering results. The magnetic structures ascertained through representational analysis indicate that at T _N, a paramagnetic state is transformed to Γ₅(Cx, Fy, Az) antiferromagnetic structure while, at T _SR, Fe/Co moments undergo a spin reorientation to Γ₃(Gx, Ay, Fz). The refined magnetic moment of (Fe/Co) is 1.47(4) μ _B at 7 K. The antiferromagnetic structure found experimentally is supported through the DFT calculations which predict an insulating electronic state in Dy₂FeCoO₆.