Size-Induced Transition from Magnetic Ordering to Kondo Behavior in (Ce,AI) Compounds

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題名:	Size-Induced Transition from Magnetic Ordering to Kondo Behavior in (Ce,AI) Compounds
作者:	Chen, Yih-Sharng;Yao, Y. D.;Wang, chang-Ren;Li, W. H.;張經霖;Chang, Ching-Lin;Lee, T. K.;Hong, T. M.;Ho, Jui-Chi;Pan, S. F.
貢獻者:	淡江大學物理學系
日期:	2000-05-22
上傳時間:	2009-12-31 10:49:10 (UTC+8)
出版者:	College Park: American Physical Society (APS)
摘要:	Magnetic ordering and Kondo behavior coexist in three (Ce,Al)-based compounds: CeAl2, Ce3Al, and Ce3Al11. A common feature apparently independent of crystal structures also prevails in terms of the size-induced transition between these two magnetic phenomena. As the particle size is reduced to nanoscale, the specific heat anomaly associated with the magnetic ordering diminishes. Although the Kondo temperature also decreases, the entropy associated with Kondo anomaly exhibits a large increase. This results in an enhancement of the Kondo behavior and an increased coefficient γ of the linear term in specific heat. For example, in 80 Å CeAl2 the extrapolated r(0) reaches 9000mJmolCe−1K−2.
關聯:	Physical Review Letters 84(21), pp.4990-4993
DOI:	10.1103/PhysRevLett.84.4990
顯示於類別:	[物理學系暨研究所] 期刊論文

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