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

The spin dynamics of a quasi one dimensional $S=1$ bond alternating spin-gapantiferromagnet Ni(C$_9$H$_{24}$N$_4$)NO$_2$(ClO$_4$) (abbreviated as NTENP) isstudied by means of electron spin resonance (ESR) technique. Five modes of ESRtransitions are observed and identified: transitions between singlet groundstate and excited triplet states, three modes of transitions between spinsublevels of collective triplet states and antiferromagnetic resonanceabsorption in the field-induced antiferromagnetically ordered phase.Singlet-triplet and intra-triplet modes demonstrate a doublet structure whichis due to two maxima in the density of magnon states in the low-frequencyrange. A joint analysis of the observed spectra and other experimental resultsallows to test the applicability of the fermionic and bosonic models. Weconclude that the fermionic approach is more appropriate for the particularcase of NTENP.

Modes of magnetic resonance of S=1 dimer chain compound NTENP