Magnetic properties of monoclinic phase LiAl0.05Mn0.95O2

✍ Scribed by Young-Il Jang; F.C. Chou; Yet-Ming Chiang

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 396 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00241-3

✦ Synopsis

Magnetic characterization was performed on the Al-doped monoclinic phase of LiMnO 2 stabilized by high-temperature firing in reducing atmosphere. Curie and Weiss constants (C 0:0315 emu K=g Oe; Q Ϫ566 K) obtained in the paramagnetic regime indicate strong antiferromagnetic interactions between the high-spin Mn 3ϩ ions. Spin-glass behavior is observed at low temperatures, and is attributed to geometrical frustration due to triangular antiferromagnetism and randomness due to Al substitution and cation disorder. Paramagnetic behavior is observed below the spin freezing temperature, indicating the presence of some unfrozen spins.