Synthesis and magnetic properties of fergusonite-structured La(NbVMn)O4. Issue 4 (1st August 2013)

• Record Type: Journal Article
• Authors: Harada, Juri; Mitome, Masanori; Yubuta, Kunio; Shishido, Toetsu; Tsutsui, Fuki; Ohmura, Kazuyo; Kawakami, Shunsuke; Arai, Masao; Kohiki, Shigemi; Takeda, Naoya
• Is Part Of: Emerging materials research. Volume 2:Issue 4(2013)
• Page Start: 191
• Page End: 197
• Publication Date: 2013-08-01
• Subjects: defects; -- magnetic properties; -- bulk materials; -- electronic structure of atoms and molecules; Materials -- Periodicals; 620.11
• DOI: 10.1680/emr.13.00018
• Languages: English
• ISSNs: 2046-0147

Abstract

Abstract : The authors have synthesized fergusonite-structured La(Nb0·71 V0·04 Mn0·25 )O4 samples. The samples, consisting of La 3+, Nb 5+, V 5+, Mn 4+ and oxygen ions, demonstrated temperature-dependent magnetization that increased with lowering the temperature below ≈200 K, and almost saturated below ≈100 K. At 75 K, the field-dependent magnetization demonstrated sigmoidal curve and reached 3 μB /Mn at 1 T. Such a magnetic behavior can be ascribed to exchange interaction between Mn 4+ Nb2 O11 nanoclusters. The Mn 4+ substitution for the V 5+ sites of the crystal resulted also in the occupied state above the valence band maximum.