Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1-xCaxNiReO6

Somnath Jana; Payel Aich; P Anil Kumar; O K Forslund; E Nocerino; V Pomjakushin; M Månsson; Y Sassa; Peter Svedlindh; Olof Karis; Vasudeva Siruguri; Sugata Ray

doi:10.1038/s41598-019-54427-0

Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr_1-xCa_xNiReO₆

Sci Rep. 2019 Dec 4;9(1):18296. doi: 10.1038/s41598-019-54427-0.

Authors

Somnath Jana^{1

2

3}, Payel Aich⁴, P Anil Kumar^{5

6}, O K Forslund⁷, E Nocerino⁷, V Pomjakushin⁸, M Månsson⁷, Y Sassa⁹, Peter Svedlindh⁵, Olof Karis¹⁰, Vasudeva Siruguri¹¹, Sugata Ray^{12

4}

Affiliations

¹ Centre for Advanced Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India. sj.phys@gmail.com.
² Department of Physics and Astronomy, Uppsala University, 752 36, Uppsala, Sweden. sj.phys@gmail.com.
³ Institute for Methods and Instrumentation in Synchrotron Radiation Research FG-ISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany. sj.phys@gmail.com.
⁴ School of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
⁵ Department of Engineering Sciences, Uppsala University, 752 36, Uppsala, Sweden.
⁶ Seagate Technology, 1 Disc Drive, Springtown, Northern Ireland, BT48 0BF, United Kingdom.
⁷ Department of Applied Physics, KTH Royal Institute of Technology, SE-164 40, Stockholm, Kista, Sweden.
⁸ Laboratory for Neutron Scattering & Imaging, Paul Scherrer Institute, CH-5232, Villigen, PSI, Switzerland.
⁹ Department of Physics Chalmers University Of Technology, SE-412 96, Gteborg, Sweden.
¹⁰ Department of Physics and Astronomy, Uppsala University, 752 36, Uppsala, Sweden.
¹¹ UGC-DAE-Consortium for Scientific Research Mumbai Centre, 246C 2nd floor Common Facility Building (CFB), Bhabha Atomic Research Centre, Mumbai, 400085, India.
¹² Centre for Advanced Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.

Abstract

The magnetic ground states in highly ordered double perovskites LaSr_1-xCa_xNiReO₆ (x = 0.0, 0.5, 1.0) are studied in view of the Goodenough-Kanamori rules of superexchange interactions in this paper. In LaSrNiReO₆, Ni and Re sublattices are found to exhibit curious magnetic states separately, but no long range magnetic ordering is achieved. The magnetic transition at ~255 K is identified with the independent Re sublattice magnetic ordering. Interestingly, the sublattice interactions are tuned by modifying the Ni-O-Re bond angles through Ca doping. Upon Ca doping, the Ni and Re sublattices start to display a ferrimagnetically ordered state at low temperature. The neutron powder diffraction data reveals long range ferrimagnetic ordering of the Ni and Re magnetic sublattices along the crystallographic b-axis. The transition temperature of the ferrimagnetic phase increases monotonically with increasing Ca concentration.