𝔖 Bobbio Scriptorium
✦   LIBER   ✦

EPR monitoring of Mn4+ distribution in Li4Mn5O12 spinels

✍ Scribed by R. Stoyanova; M. Gorova; E. Zhecheva

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
394 KB
Volume
61
Category
Article
ISSN
0022-3697

No coin nor oath required. For personal study only.

✦ Synopsis

EPR of Mn 4Ο© is used to study the cation-distribution in octahedral sites of Li 4 Mn 5 O 12 spinel lattice. Analysis of the EPR line width in terms of magnetic dipole-dipole and exchange interactions points to two kinds of Mn 4Ο© in octahedral spinel sites: one of them has as first neighbours five paramagnetic Mn 4Ο© and one diamagnetic Li Ο© , whereas the second type of Mn 4Ο© is in a Lirich surrounding. On the basis of this, the existing model on the temperature dependence of the magnetic susceptibility of Li 4 Mn 5 O 12 was refined.

πŸ“œ SIMILAR VOLUMES

Chemical and Magnetic Characterization o
Chemical and Magnetic Characterization of Spinel Materials in the LiMn2O4–Li2Mn4O9–Li4Mn5O12System
✍ Christian Masquelier; Mitsuharu Tabuchi; Kazuaki Ado; Ryoji Kanno; Yo Kobayashi; πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 451 KB

packed structures was further extended by Goodenough's group to 3-D materials with the spinel structure (3). It was Lithium manganospinels belonging to the LiMn 2 O 4 -Li 2 Mn 4 O 9 -Li 4 Mn 5 O 12 system were prepared by solid-state reac-shown that lithium could be intercalated into the spinels tio

EPR of Mn4+ in spinels Li1+xMn2βˆ’xO4 with
EPR of Mn4+ in spinels Li1+xMn2βˆ’xO4 with 0≀x≀0.1
✍ R Stoyanova; M Gorova; E Zhecheva πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 189 KB

EPR of Mn 4Ο© has been used to study electron-phonon interactions and cation distribution in Li 1Ο©x Mn 2Οͺx O 4 spinels with 0 Υ… x Υ… 0:1: The EPR spectra of Mn 4Ο© in 16d spinel sites has been interpreted in terms of the bottleneck-relaxation mechanism. Two additional weak signals were registered that