science24.com - Magnetic phase transition in pure and cobalt-doped geometrically frustrated Ni3V2O8 single crystals

Search for content and authors

Magnetic phase transition in pure and cobalt-doped geometrically frustrated Ni₃V₂O₈ single crystals

Henryk Szymczak ¹, Marek Baran ¹, Ritta Szymczak ¹, Sergej N. Barilo ², Georgij Bychkov ², Sergei V. Shiryaev ²

1. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
2. The Institute of Solid State & Semiconductor Physics, Belarus NAS (ISSSP), P. Brovka, Minsk 220072, Belarus

Abstract

The recent interest in geometrically frustrated systems is spurred by the new phenomena predicted such as: noncollinear Neel long-range order, "order by disorder", magnetization plateaus and magnetization jumps. Of particular interest is magnetism on the two-dimensional kagome lattice which consists of corner-sharing triangles. Recently, magnetic phase transitions in isostructural kagome-type compounds Ni₃V₂O₈ [1] and Co₃V₂O₈ [2] have been studied in details. Since, traditionally, it is assumed that both randomness and frustration lead to spin-glass effects we decided to introduce chemical disorder by Co- doping Ni₃V₂O₈ single crystals. In this paper we describe the results of magnetic measurements performed on Ni₃V₂O₈ and Ni_2.91Co_0.09V₂O₈ single crystals. Although no spin-glass effects have been observed nevertheless a strong effect of 3 at% cobalt doping has been evidenced. In particular, Co-doping leads to new, magnetic field induced, phase transitions for H║a and H║c. It means that a strong ion-lattice coupling expected for Co²⁺ in octahedral sites is responsible for the change of magnetocrystalline anisotropy in Ni₃V₂O_8, but also for the local deformations related to a Jahn-Teller effects, which influences the exchange interactions in the system.

[1] G.Laves et al., Phys. Rev. Lett. 93 (2004) 247201.

[2] R.Szymczak et al., Phys. Rev. B 73 (2006) 094425.

Legal notice

Legal notice:

Copyright (c) Pielaszek Research, all rights reserved.
The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/7873 must be provided.

Magnetic phase transition in pure and cobalt-doped geometrically frustrated Ni3V2O8 single crystals

Presentation: Oral at E-MRS Fall Meeting 2006, Symposium K, by Henryk Szymczak See On-line Journal of E-MRS Fall Meeting 2006 Submitted: 2006-05-15 13:29 Revised: 2009-06-07 00:44

Magnetic phase transition in pure and cobalt-doped geometrically frustrated Ni₃V₂O₈ single crystals

Presentation: Oral at E-MRS Fall Meeting 2006, Symposium K, by Henryk Szymczak
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-15 13:29 Revised: 2009-06-07 00:44