Heavy-fermion behavior in CeAl2 nanoparticles

Y. Y. Chen; Y. D. Yao; T. K. Lee; W. C. Liu; H. C. Chang; K. Y. Lin; Y. S. Lin; Z. C. Wang; W. H. Li

doi:10.1016/S0965-9773(99)00225-1

Heavy-fermion behavior in CeAl₂ nanoparticles

Y. Y. Chen, Y. D. Yao, T. K. Lee, W. C. Liu, H. C. Chang, K. Y. Lin, Y. S. Lin, Z. C. Wang, W. H. Li

物理學系

研究成果: 雜誌貢獻 › 會議論文 › 同行評審

摘要

In order to examine the quantum size effects on the heavy-fermion behavior in CeAl₂, we have performed measurements of the low-temperature specific heats for CeAl₂ nanoparticles with average particle size 80 angstrom for temperature down to 80mK. For 80 angstrom - nanoparticles the magnitude of γ of CeAl₂ can be as high as 3600mJ/K² f.u. at T=80mK with T_K ≈ 0.65K. Compared with the sharp anti-ferromagnetic order (T_N=3.8K) in bulk CeAl₂ only a blurred peak at same temperatures is observed in CeAl₂ nanoparticles. Due to the suppression of the long-range magnetic order by the limited geometric size and the less degeneracy of the density of states of conduction electrons D(ε_F) the enhanced heavy-fermion behavior (in terms of γ) and the disappearance of magnetic order in CeAl₂ nanoparticles are attributed to the quantum size effects in nanoparticles.

原文	???core.languages.en_GB???
頁（從 - 到）	719-724
頁數	6
期刊	Nanostructured Materials
卷	12
發行號	5
DOIs	https://doi.org/10.1016/S0965-9773(99)00225-1
出版狀態	已出版 - 1999
事件	Proceedings of the 1998 4th International Conference on Nanostructured Materials (NANO '98) - Stockholm, Swed 持續時間: 14 6月 1998 → 19 6月 1998

存取文件

10.1016/S0965-9773(99)00225-1

引用此

@article{2b0a31309bd24d4eb582492d813c49ac,

title = "Heavy-fermion behavior in CeAl2 nanoparticles",

abstract = "In order to examine the quantum size effects on the heavy-fermion behavior in CeAl2, we have performed measurements of the low-temperature specific heats for CeAl2 nanoparticles with average particle size 80 angstrom for temperature down to 80mK. For 80 angstrom - nanoparticles the magnitude of γ of CeAl2 can be as high as 3600mJ/K2 f.u. at T=80mK with TK ≈ 0.65K. Compared with the sharp anti-ferromagnetic order (TN=3.8K) in bulk CeAl2 only a blurred peak at same temperatures is observed in CeAl2 nanoparticles. Due to the suppression of the long-range magnetic order by the limited geometric size and the less degeneracy of the density of states of conduction electrons D(εF) the enhanced heavy-fermion behavior (in terms of γ) and the disappearance of magnetic order in CeAl2 nanoparticles are attributed to the quantum size effects in nanoparticles.",

author = "Chen, {Y. Y.} and Yao, {Y. D.} and Lee, {T. K.} and Liu, {W. C.} and Chang, {H. C.} and Lin, {K. Y.} and Lin, {Y. S.} and Wang, {Z. C.} and Li, {W. H.}",

year = "1999",

doi = "10.1016/S0965-9773(99)00225-1",

language = "???core.languages.en_GB???",

volume = "12",

pages = "719--724",

journal = "Nanostructured Materials",

issn = "0965-9773",

number = "5",

note = "null ; Conference date: 14-06-1998 Through 19-06-1998",

}

TY - JOUR

T1 - Heavy-fermion behavior in CeAl2 nanoparticles

AU - Chen, Y. Y.

AU - Yao, Y. D.

AU - Lee, T. K.

AU - Liu, W. C.

AU - Chang, H. C.

AU - Lin, K. Y.

AU - Lin, Y. S.

AU - Wang, Z. C.

AU - Li, W. H.

PY - 1999

Y1 - 1999

N2 - In order to examine the quantum size effects on the heavy-fermion behavior in CeAl2, we have performed measurements of the low-temperature specific heats for CeAl2 nanoparticles with average particle size 80 angstrom for temperature down to 80mK. For 80 angstrom - nanoparticles the magnitude of γ of CeAl2 can be as high as 3600mJ/K2 f.u. at T=80mK with TK ≈ 0.65K. Compared with the sharp anti-ferromagnetic order (TN=3.8K) in bulk CeAl2 only a blurred peak at same temperatures is observed in CeAl2 nanoparticles. Due to the suppression of the long-range magnetic order by the limited geometric size and the less degeneracy of the density of states of conduction electrons D(εF) the enhanced heavy-fermion behavior (in terms of γ) and the disappearance of magnetic order in CeAl2 nanoparticles are attributed to the quantum size effects in nanoparticles.

AB - In order to examine the quantum size effects on the heavy-fermion behavior in CeAl2, we have performed measurements of the low-temperature specific heats for CeAl2 nanoparticles with average particle size 80 angstrom for temperature down to 80mK. For 80 angstrom - nanoparticles the magnitude of γ of CeAl2 can be as high as 3600mJ/K2 f.u. at T=80mK with TK ≈ 0.65K. Compared with the sharp anti-ferromagnetic order (TN=3.8K) in bulk CeAl2 only a blurred peak at same temperatures is observed in CeAl2 nanoparticles. Due to the suppression of the long-range magnetic order by the limited geometric size and the less degeneracy of the density of states of conduction electrons D(εF) the enhanced heavy-fermion behavior (in terms of γ) and the disappearance of magnetic order in CeAl2 nanoparticles are attributed to the quantum size effects in nanoparticles.

UR - http://www.scopus.com/inward/record.url?scp=0032594004&partnerID=8YFLogxK

U2 - 10.1016/S0965-9773(99)00225-1

DO - 10.1016/S0965-9773(99)00225-1

M3 - 會議論文

AN - SCOPUS:0032594004

VL - 12

SP - 719

EP - 724

JO - Nanostructured Materials

JF - Nanostructured Materials

SN - 0965-9773

IS - 5

Y2 - 14 June 1998 through 19 June 1998

ER -

Heavy-fermion behavior in CeAl2 nanoparticles

摘要

存取文件

指紋

引用此

Heavy-fermion behavior in CeAl₂ nanoparticles