English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We successfully synthesized a verdazyl-based charge-transfer salt$[$$o$-MePy-V-($p$-Br)$_2]$FeCl$_4$, which has an $S_{\rm{V}}$=1/2 on theradical $o$-MePy-V-($p$-Br)$_2$ and an $S_{\rm{Fe}}$=5/2 on the FeCl$_4$ anion.$Ab$ $initio$ molecular orbital calculations indicate the formation of an$S_{\rm{V}}$=1/2 honeycomb lattice composed of three types of exchangeinteraction with two types of inequivalent site. Further, the $S_{\rm{V}}$=1/2at one site is sandwiched by $S_{\rm{Fe}}$=5/2 spins through antiferromagnetic(AF) interactions. The magnetic properties indicate that the dominant AFinteractions between the $S_{\rm{V}}$ = 1/2 spins form a gapped singlet state,and the remaining $S_{\rm{Fe}}$ = 5/2 spins cause an AF order. Themagnetization curve exhibits a linear increase up to approximately 7 T, and anunconventional 5/6 magnetization plateau appears between 7 T and 40 T. Wediscuss the differences between the effective interactions associated with themagnetic properties of the present compound and ($o$-MePy-V)FeCl$_4$. Weexplain the low-field linear magnetization curve through a mean-fieldapproximation of an $S_{\rm{Fe}}$ = 5/2 spin model. At higher field regions,the 5/6 magnetization plateau and subsequent nonlinear increase are reproducedby the $S_{\rm{V}}$ = 1/2 AF dimer, in which a particular internal field isapplied to one of the spin sites. The ESR resonance signals in thelow-temperature and low-field regime are explained by conventionaltwo-sublattice AF resonance modes with easy-axis anisotropy. These resultsdemonstrate that exchange interactions between $S_{\rm{V}}$ = 1/2 and$S_{\rm{Fe}}$ = 5/2 spins in $[$$o$-MePy-V-($p$-Br)$_2]$FeCl$_4$ realizeunconventional magnetic properties with low-field classical behavior andfield-induced quantum behavior.

Field-induced quantum magnetism in the verdazyl-based charge-transfer salt $[$$o$-MePy-V-($p$-Br)$_2]$FeCl$_4$