Magnetic frustration in partially ordered double perovskites Ln(3)Ni(2)RuO(9) (Ln = La, Nd)

Laha, S and Gopalakrishnan, J and Natarajan, S and Romero de Paz, J and Solana-Madruga, E and Dos Santos-Garcia, A J and Garcia-Martin, S and Fabelo, O and Moran-Miguelez, E and Saez-Puche, R (2019) Magnetic frustration in partially ordered double perovskites Ln(3)Ni(2)RuO(9) (Ln = La, Nd). In: JOURNAL OF ALLOYS AND COMPOUNDS, 806 . pp. 1509-1516.

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Abstract

Ln(3)Ni(2)RuO(9) (Ln = La, Nd) oxides (prepared by a solid state metathesis route) adopt a monoclinic (P2(1)/n) A(2)BB'O-6 double perovskite structure wherein the two independent octahedral 2c and 2d sites are occupied by Ni2+ and (Ni1/32+Ru2/35+) cations, respectively. In contrast to the expected ferromagnetic behavior, Ln(3)Ni(2)RuO(9) oxides show a spin-glass behavior without long range magnetic order down to 2 K. These results reveal the importance of competing nearest neighbor (NN), next nearest neighbor (NNN) and third nearest neighbor (third NN) interactions between the magnetic Ni2+ and Ru5+ ions in the partially ordered double perovskite structure that conspire to thwart the expected ferromagnetic order in these materials.

Item Type:	Journal Article
Publication:	JOURNAL OF ALLOYS AND COMPOUNDS
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	copyright for this article belongs to ELSEVIER SCIENCE SA
Keywords:	Oxide materials; Double perovskite; Solid state metathesis; Powder neutron diffraction; Spin-glass behavior
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	05 Nov 2019 07:27
Last Modified:	05 Nov 2019 07:27
URI:	http://eprints.iisc.ac.in/id/eprint/63669

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