Increase in magnetoresistivity in Ba2CoS3via Zn2+/Co2+ substitution

Mark Harrison (1) , Vincent Hardy (2) , Antoine Maignan (3) , M. Grazia Francesconi (1)

1 Department of Chemistry, Hull University
2 EES - Ecologie, Evolution, Symbiose
3 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

We report an increase of negative magnetoresistivity from 1.7% to 9% in the Ba2Co0.5Zn0.5S3 series (0 ≤x≤ 0.5), derived from Zn2+/Co2+ substitution in Ba2CoS3; Zn2+ substitution destroys the one-dimensional antiferromagnetic ordering typical of Ba2CoS3, in favour of a paramagnetic behaviour, and considerably increases the value of the resistivity, and to the best of our knowledge Ba2Co0.5Zn0.5S3 shows the most negative magnetoresistivity among the one-dimensional sulfides (MR ∼ 9%).

Domains: Chemical Sciences; Material chemistry

Mark Harrison, Vincent Hardy, Antoine Maignan, M. Grazia Francesconi. Increase in magnetoresistivity in Ba2CoS3via Zn2+/Co2+ substitution. Chemical Communications, 2009, 16, pp.2214. ⟨10.1039/b817363j⟩. ⟨hal-02264234⟩