MAGNETIC STUDIES OF END-CHAIN SPIN EFFECTS IN THE HALDANE-GAP MATERIAL NI(C3H10N2) N-2(3)(CLO4)

Authors
GRANROTH GE MAEGAWA S MEISEL MW KRZYSTEK J BRUNEL LC BELL NS ADAIR JH WARD BH FANUCCI GE CHOU LK TALHAM DR
Citation
Ge. Granroth et al., MAGNETIC STUDIES OF END-CHAIN SPIN EFFECTS IN THE HALDANE-GAP MATERIAL NI(C3H10N2) N-2(3)(CLO4), Physical review. B, Condensed matter, 58(14), 1998, pp. 9312-9315
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
58
Issue
14
Year of publication
1998
Pages
9312 - 9315
Database
ISI
SICI code
0163-1829(1998)58:14<9312:MSOESE>2.0.ZU;2-F
Abstract
Electron spin resonance (ESR), at 9, 94, and 190 GHz, and magnetizatio n studies on polycrystalline, powder, and ultrafine powder samples of Ni(C3H10N2)(2)N-3(ClO4) (NINAZ) have revealed several effects arising from the Haldane phase. Using the g value of the end-chain spin S as d etermined by ESR, our results confirm that the end-chain spins are S=1 /2 and show no evidence for S=1 end-chains. In addition, the ESR signa ls reveal spectral weight consistent with a model describing interacti ons between the end-chain spins on the shortest chains and between the magnetic excitations on the chains and the end-chain spins. [S0163-18 29(98)09538-1].