Magnetic order and enhanced exchange in the quasi-one-dimensional molecule-based antiferromagnet Cu(NO₃)₂(pyz)₃

Abstract

The magnetic properties of Cu(NO3)2(pyz)3 demonstrate ideal one-dimensional Heisenberg antiferromagnetic behaviour owing to the local environment of Cu2+ ions.

Magnetic ground state of the one-dimensional ferromagnetic chain compoundsM(NCS)2(thiourea)2(MCurley1, Scatena2, Williams3 et al. 2021Phys. Rev. MaterialsSelf Cite8130View full textAdd to dashboardCite

“…In terms of physically realising such systems, the use of organic ligands has proven highly effective in constructing crystal architectures that readily promote lowdimensional magnetic behaviour [12][13][14][15][16]. A selection of recently published materials showcase the ability to test the limits of the theoretical understanding of S = 1/2 and S = 1 chain materials [17][18][19]. To achieve quasi-onedimensional (Q1D) behaviour, the choice of intrachain bridging-ligand is a decisive one, as it ultimately determines the sign and strength of the intrachain exchange interaction (J).…”

Probing magnetic order and disorder in the one-dimensional molecular spin chains CuF2(pyz) and [Ln(hfac)3(boaDTDA)] n (Ln = Sm, La) using implanted muons

“…Consequently, the entropy change on ordering will be much reduced compared to a more isotropic system and may prevent specific heat measurements from detecting a transition [7]. For this reason sensitive magnetic measurement techniques such as muon-spin relaxation (µ + SR) have found a use in detecting the transitions to long range magnetic order that allow us to quantify the strength of the interchain exchange and reveal how well real materials are described by idealised models [9,6,10] In this paper we present µ + SR measurements on two different 1D coordination polymer systems: (i) the quasi-1D Heisenberg antiferromagnet CuF 2 (pyz), built from (boaDTDA) is the radical ligand 4-(benzoxazol-20-yl)-1,2,3,5-dithiadiazolyl and hfac = 1,1,1,5,5,5-hexafluoroacetylacetonato [12,13]. In both systems, the muon relaxation is dominated by the magnetism of the nuclear spins in the high-temperature paramagnetic regime owing to the rapid fluctuations of the electronic spins on the timescale of muon spin precession.…”

The quantum muon

“…In contrast, µSR identifies such transitions extremely easily, as once three-dimensional order is established, a beautiful spin precession signal suddenly appears [see, for example, Fig. 1(b)], as has been shown in numerous studies on low-dimensional molecular magnetic systems [34,[42][43][44][45][46][47][48][49]. µSR measurements determine T N and hence allow an estimate of the anisotropy [37] [some collected results are given in Fig.…”