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Electronic States for Dense Kondo Amorphous Alloy Ce-Al
Wuriga,Kotaro Segawa,Yusuke Amakai 한국물리학회 2023 새물리 Vol.73 No.12
We have performed the magnetic susceptibility χ, specific heat C<SUB>p</SUB>, and photoelectron spec-troscopy (XPS) measurements on the dense Kondo amorphous alloys Ce<SUB>50-x</SUB>La<SUB>x</SUB>Al<SUB>50</SUB> and discussed its electronic structure. The χ follows a Curie-Weiss law with the paramagnetic e_ective magnetic 2.1{2.3 _B/Ce-atom above 70 K. The electronic specific heat coe_cient per Ce-atom Ce is almost constant in each La concentration (<SUB>rCe</SUB> = 200 mJ mol<SUP>-1</SUP> K<SUP>-2</SUP>). From XPS measurements, the Ce-contained sample (x ≤ 25) is in a hybridization state with conduction electrons (Kondo effect) at room temperature, although the Ce is trivalent, and the Kondo temperature is distributed over a wide temperature range.