Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1-xCaxNiReO6
Artikel i vetenskaplig tidskrift, 2019

The magnetic ground states in highly ordered double perovskites LaSr1-xCaxNiReO6 (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 similar to 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.


Somnath Jana


Indian Association for the Cultivation of Science

Uppsala universitet

Payel Aich

Indian Association for the Cultivation of Science

P. Anil Kumar

Seagate Technology Marlow Ltd

Uppsala universitet

O. K. Forslund

Kungliga Tekniska Högskolan (KTH)

E. Nocerino

Kungliga Tekniska Högskolan (KTH)

V. Pomjakushin

Paul Scherrer Institut

M. Mansson

Kungliga Tekniska Högskolan (KTH)

Yasmine Sassa

Chalmers, Fysik, Materialfysik

Peter Svedlindh

Uppsala universitet

Olof Karis

Uppsala universitet

Vasudeva Siruguri

Bhabha Atomic Research Centre

Sugata Ray

Indian Association for the Cultivation of Science

Scientific Reports

2045-2322 (ISSN)

Vol. 9 1 18296


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