Physical properties of Β-TmAlB4; An AlB2 -type analogous "tiling" compound

T. Mori, T. Shishido, K. Yubuta, K. Nakajima, A. Leithe-Jasper, Yu Grin

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)

抄録

Β -TmAlB4 was synthesized, and the magnetic properties and specific heat investigated in comparison with those of the α -type structure. Recent developments in rare earth aluminoboride compounds with two-dimensional boron layers have attracted interest due to the heavy fermion superconductivity in Β -YbAlB4, multiple anomalies manifesting below the Ńel temperatures in α -TmAlB4 attributed to intrinsic building defects, and field stable state in Tm2 AlB6. Strikingly, despite similarities in the metal-metal nearest neighbor distances and structural motifs, the strength of the magnetic interactions (temperature scale) in Β -TmAlB4 was discovered to be approximately 60% stronger that of the alpha phase (i.e., TN=9.2 versus 5.8 K). An anomaly in the specific heat with extreme field stability was also found with a temperature scale significantly higher compared to that of the α -type structure. This anomaly is conjectured to be a precursor to the antiferromagnetic transition and may be a particular feature of these "tiling" compounds with analogy to AlB2 -type structure.

本文言語英語
論文番号09E112
ジャーナルJournal of Applied Physics
107
9
DOI
出版ステータス出版済み - 5月 1 2010
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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