Large negative magnetoresistance of the rare-earth transition-metal intermetallic compound PrMnSi 2

Sang Hwan Kim, Dong Kyun Seo, Reinhard K. Kremer, Jürgen Köhler, Antoine Villesuzanne, Myung Hwan Whangbo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The rare-earth intermetallic compound PrMnSi 2 consists of two magnetic sublattices, i.e., layers of Mn atoms and layers of Pr atoms, which repeat in the (-Mn-Pr-Pr-) sequence. Electrical resistivity measurements were carried out for PrMnSi 2 between 2 and 350 K under various magnetic fields. PrMnSi 2 is a metal with two metal-to-metal transitions at ∼20 and ∼50 K, and its resistivity vs temperature curves show a significant hysteresis in the absence and presence of an external magnetic field. The resistivity is reduced by an external magnetic field, and this negative magnetoresistance reaches up to 47% at 9 T around 17 K where PrMnSi 2 is antiferromagnetic at zero field. The magnetoresistance vs temperature curves of PrMnSi 2 reveal three peaks at fields up to ∼3 T, which correspond to the three magnetic phase transitions of PrMnSi 2 observed from magnetic susceptibility and heat capacity measurements. The negative magnetoresistance and the resistivity hysteresis of PrMnSi 2 were accounted for by considering how the scattering of the electrons at the Fermi level is reduced by an applied field.

Original languageEnglish
Pages (from-to)6338-6341
Number of pages4
JournalChemistry of Materials
Volume17
Issue number25
DOIs
Publication statusPublished - Dec 13 2005

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Magnetoresistance
Rare earths
Intermetallics
Transition metals
Magnetic fields
Hysteresis
Metals
Atoms
Fermi level
Magnetic susceptibility
Specific heat
Phase transitions
Scattering
Temperature
Electrons

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Large negative magnetoresistance of the rare-earth transition-metal intermetallic compound PrMnSi 2 . / Kim, Sang Hwan; Seo, Dong Kyun; Kremer, Reinhard K.; Köhler, Jürgen; Villesuzanne, Antoine; Whangbo, Myung Hwan.

In: Chemistry of Materials, Vol. 17, No. 25, 13.12.2005, p. 6338-6341.

Research output: Contribution to journalArticle

Kim, Sang Hwan ; Seo, Dong Kyun ; Kremer, Reinhard K. ; Köhler, Jürgen ; Villesuzanne, Antoine ; Whangbo, Myung Hwan. / Large negative magnetoresistance of the rare-earth transition-metal intermetallic compound PrMnSi 2 . In: Chemistry of Materials. 2005 ; Vol. 17, No. 25. pp. 6338-6341.
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AU - Villesuzanne, Antoine

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AB - The rare-earth intermetallic compound PrMnSi 2 consists of two magnetic sublattices, i.e., layers of Mn atoms and layers of Pr atoms, which repeat in the (-Mn-Pr-Pr-) ∞ sequence. Electrical resistivity measurements were carried out for PrMnSi 2 between 2 and 350 K under various magnetic fields. PrMnSi 2 is a metal with two metal-to-metal transitions at ∼20 and ∼50 K, and its resistivity vs temperature curves show a significant hysteresis in the absence and presence of an external magnetic field. The resistivity is reduced by an external magnetic field, and this negative magnetoresistance reaches up to 47% at 9 T around 17 K where PrMnSi 2 is antiferromagnetic at zero field. The magnetoresistance vs temperature curves of PrMnSi 2 reveal three peaks at fields up to ∼3 T, which correspond to the three magnetic phase transitions of PrMnSi 2 observed from magnetic susceptibility and heat capacity measurements. The negative magnetoresistance and the resistivity hysteresis of PrMnSi 2 were accounted for by considering how the scattering of the electrons at the Fermi level is reduced by an applied field.

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