Possibility of the Kondo effect in diluted EuPd2Si2 systems with constant lattice volume

T. Kuwai, H. Suzuki, T. Saitoh, T. Nanbu, Akihiro Mitsuda, T. Mizushima, Y. Isikawa

Research output: Contribution to journalArticle

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Abstract

Specific heat C and electrical resistivity ρ between 0.2 and 300 K were investigated for Eu-diluted alloys replacing by the (La0.67Y0.33) component with almost constant lattice volume, on a well-known valence-transition (VT) material EuPd2Si2. The inter-site cooperative effect bringing the sharp VT at 150 K in EuPd2Si2 was revealed to be disintegrated by the dilution beyond 25 at% for Eu from the present results in both the quantities. Moreover, a logarithmic upturn in ρ below about 20 K was recognized for the samples with the dilution beyond 25 at%, correspondingly with the steep enhancement in the magnetic part of C/T reaching 500 mJ/K2 Eu-mol toward the zero temperature. Discussion from the standpoint of the Kondo effect is briefly developed for the present Eu-diluted alloys.

Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 1
DOIs
Publication statusPublished - Mar 1 2007

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Kondo effect
Dilution
Lattice constants
dilution
valence
electrical resistivity
Specific heat
specific heat
augmentation
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Possibility of the Kondo effect in diluted EuPd2Si2 systems with constant lattice volume. / Kuwai, T.; Suzuki, H.; Saitoh, T.; Nanbu, T.; Mitsuda, Akihiro; Mizushima, T.; Isikawa, Y.

In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 1, 01.03.2007.

Research output: Contribution to journalArticle

Kuwai, T. ; Suzuki, H. ; Saitoh, T. ; Nanbu, T. ; Mitsuda, Akihiro ; Mizushima, T. ; Isikawa, Y. / Possibility of the Kondo effect in diluted EuPd2Si2 systems with constant lattice volume. In: Journal of Magnetism and Magnetic Materials. 2007 ; Vol. 310, No. 2 SUPPL. PART 1.
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AU - Kuwai, T.

AU - Suzuki, H.

AU - Saitoh, T.

AU - Nanbu, T.

AU - Mitsuda, Akihiro

AU - Mizushima, T.

AU - Isikawa, Y.

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AB - Specific heat C and electrical resistivity ρ between 0.2 and 300 K were investigated for Eu-diluted alloys replacing by the (La0.67Y0.33) component with almost constant lattice volume, on a well-known valence-transition (VT) material EuPd2Si2. The inter-site cooperative effect bringing the sharp VT at 150 K in EuPd2Si2 was revealed to be disintegrated by the dilution beyond 25 at% for Eu from the present results in both the quantities. Moreover, a logarithmic upturn in ρ below about 20 K was recognized for the samples with the dilution beyond 25 at%, correspondingly with the steep enhancement in the magnetic part of C/T reaching 500 mJ/K2 Eu-mol toward the zero temperature. Discussion from the standpoint of the Kondo effect is briefly developed for the present Eu-diluted alloys.

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