A collapse of ferromagnetism in an organic based magnet under pressure

Berlie, Adam; Terry, Ian; Szablewski, Marek; Xiao, Fan; Williams, Robert C.

Abstract

The metal-organic charge transfer compound NiTCNQ2 has been subjected to pressure where both magnetisation and muon experiments show a suppression of T C with an applied pressure. At 12 kbar, it appears that the sample is paramagnetic and this gives an estimate of the pressure required for switching the transition on/off. The present work also provides some insight into the molecular structure since this behaviour can be explained if the structure is 3D. It is proposed that the TCNQ interactions increase along a stack with increasing pressure which causes spins on the TCNQ to couple into a singlet state with just isolated Ni ions left, which behave paramagnetically.

Citation

Berlie, A., Terry, I., Szablewski, M., Xiao, F., & Williams, R. C. (2017). A collapse of ferromagnetism in an organic based magnet under pressure. Materials Research Express, 4(2), Article 026103. https://doi.org/10.1088/2053-1591/aa5b50

• Journal Article Type: Article
• Acceptance Date: Jan 23, 2017
• Online Publication Date: Feb 14, 2017
• Publication Date: Feb 14, 2017
• Deposit Date: Feb 14, 2017
• Publicly Available Date: Feb 14, 2018
• Journal: Materials Research Express
• Electronic ISSN: 2053-1591
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 4
• Issue: 2
• Article Number: 026103
• DOI: https://doi.org/10.1088/2053-1591/aa5b50
• Public URL: https://durham-repository.worktribe.com/output/1386324