Dense Kondo behavior in the electric resistivity and the specific heat of amorphous CexMn100-x alloy

Physica B: Condensed Matter

Volumn 359-361, Issue SPEC. ISS., 2005, Pages 299-301

  Obi, Y ^a   Murayama, S ^b   Amakai, Y ^b   Asano, K ^b  

^a TOHOKU UNIVERSITY   (Japan)

^b MURORAN INSTITUTE OF TECHNOLOGY   (Japan)

Author keywords

Amorphous alloy; Dense Kondo behavior; Kadowaki Woods plot

Indexed keywords

AMORPHOUS ALLOYS; COMPUTATIONAL METHODS; DATA REDUCTION; ELECTRIC RESISTANCE; ELECTRON TUNNELING; LOW TEMPERATURE EFFECTS; SPECIFIC HEAT;

DENSE KONDO BEHAVIOR; HEAVY-FERMION STATE; KADOWAKI-WOODS PLOT; SYSTEMATIC CHANGE;

CERIUM ALLOYS;

EID: 18244407524     PISSN: 09214526     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.physb.2005.01.113     Document Type: Conference Paper

References (8)

1. K. Sumiyama, K. Suzuki, and Y. Homma Sci. Rep. RITU A 42 1996 85
2. S. Kikegawa, Y. Amakai, K. Asano, S. Murayama, H. Takano, Y. Obi, J. Magn. Magn. Mater. 272-276 (2004) 72.
3. Y. Obi, S. Murayama, S. Kikegawa, and T. Matsumura Acta Phys. Pol. B 34 2003 1327
4. In our previous paper [3], we have reported a huge value of A, followed by the log T dependence of ρ for Ce 79 Mn 21 alloy. But later this sample has been revealed to be partially annealed. According to our recent study the behavior of electric resistivity is very sensitive on the annealing. The result of the study of annealing effect on the electric resistivity will be published elsewhere.
5. K. Kadowaki, and S.B. Woods Solid State Commun. 58 1986 507
6. J.H. Mooij Phys. Status Solidi A 17 1973 521
7. Here we put approximately ρ mag ∼ ρ - ρ 0. In amorphous material ρ mag = ρ - ρ ex (where ρ ex = ρ phonon + ρ amorphous). In non-magnetic amorphous alloys ρ ex is approximately estimated as ρ ex = ρ 0 + (ρ M - ρ 0) ζ T [P.A. Lee, et al., Rev. Mod. Phys. 57 (1985) 287]. In a- Ce 65 Mn 35 and Ce 71 Mn 29 with ρ 0 ∼ 150 μ Ω cm, α is negligible and so ρ mag ∼ ρ - ρ 0, while in a- Ce 79 Mn 21 with ρ 0 ∼ 110 μ Ω cm, α is at most 150 μ m / K by Mooij rule [6], which gives ζ ∼ 400 μ m / K and then short calculation under taking ρ ex gives the deviation of A of about 5 %.
8. H. Kontani J. Phys. Soc. Japan 73 2004 515