Magnetic Structure and Spin Reorientation Transition in ScMnO3

✍ Scribed by M. Bieringer; J.E. Greedan

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 216 KB
• Volume: 143
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1998.8127

✦ Synopsis

The magnetic structure of ScMnO 3 was investigated using polycrystalline samples. Bulk magnetic measurements were carried out revealing a Neel temperature of 130 K, followed by two maxima at 58 K and 40 K. The high-temperature data indicate strong antiferromagnetic coupling between Mn 3؉ ions in the form of a large, negative ‫؍‬ ؊943(7) K. Powder neutron diffraction as a function of temperature disclosed magnetic long-range ordering below 130 K, where the chemical and magnetic unit cell have the same volume. A 120°magnetic structure was found consistent with the triangular Mn 3؉ sublattice and frustrated antiferromagnetic nearest neighbor coupling. The orientation of the magnetic spins is temperature dependent below 70 K.