Static and dynamic magnetic response of fragmented haldane-like spin chains in layered Li3Cu2SbO6

• Verfasst von: Koo, Changhyun [VerfasserIn]
• Verfasst von: Klingeler, Rüdiger [VerfasserIn]
• Titel: Static and dynamic magnetic response of fragmented haldane-like spin chains in layered Li3Cu2SbO6
• Verf.angabe: Changhyun Koo, Elena A. Zvereva, Igor L. Shukaev, Michael Richter, Mikhail I. Stratan, Alexander N. Vasiliev, Vladimir B. Nalbandyan, and Rüdiger Klingeler
• E-Jahr: 2016
• Jahr: July 11, 2016
• Umfang: ? S.
• Fussnoten: Gesehen am 15.05.2020
• Titel Quelle: Enthalten in: Nihon-Butsuri-GakkaiJournal of the Physical Society of Japan
• Ort Quelle: Tokyo : The Physical Society of Japan, 1946
• Jahr Quelle: 2016
• Band/Heft Quelle: 85(2016,8) Artikel-Nummer 084702, ? Seiten
• ISSN Quelle: 1347-4073
• DOI: doi:10.7566/JPSJ.85.084702
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1698306970

Abstract

The structure and the magnetic properties of layered Li3Cu2SbO6 are investigated by powder X-ray diffraction, static susceptibility, and electron spin resonance studies up to 330 GHz. The XRD data experimentally verify the space group C2/m with halved unit cell volume in contrast to previously reported C2/c. In addition, the data show significant Li/Cu-intersite exchange. Static magnetic susceptibility and ESR measurements show two magnetic contributions, i.e., quasi-free spins at low-temperature and a spin-gapped magnetic subsystem, with about half of the spins being associated to each subsystem. The data suggest ferromagnetic-antiferromagnetic alternating chains with JFM = −285 K and JAFM = 160 K with a significant amount of Li-defects in the chains. The results are discussed in the scenario of fragmented 1D S = 1 AFM chains with a rather high defect concentration of about 17% and associated S = 1/2 edge states of the resulting finite Haldane chains.