Interplay of Charge-Density Wave and Magnetic Order in Ternary Rare-Earth Nickel Carbides, RNiC

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概要

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• The electrical and structural properties of NdNiC<inf>2</inf>and PrNiC<inf>2</inf>are examined in single-crystalline samples in order to investigate the interplay of charge-density wave (CDW) and magnetic order in ternary rare-earth nickel carbides, RNiC<inf>2</inf>, where R is a rare-earth element. PrNiC<inf>2</inf>(no magnetic order down to 1.5 K) and NdNiC<inf>2</inf>[antiferromagnetic (AF) transition at 17.2 K] show resistance anomalies at 89 and 121 K, respectively, which are revealed to be CDW transitions by observing X-ray satellite reflections. NdNiC<inf>2</inf>also shows a gradual decrease in both resistivity and CDW amplitude below the Néel temperature. In the AF phase, the magnetoresistance sharply decreases where a ferromagnetic (FM) order occurs, which is realized above the spin-flop magnetic field. These results clearly suggest that the relationships between CDW and magnetic order in RNiC<inf>2</inf>depend on whether the magnetic order is AF or FM.

• 2013-12-15

著者

• Nogami Yoshio

  Department Of Physics Graduate School Of Natural Science And Technology Okayama University

• Kondo Ryusuke

  Department Of Art And Science The University Of Tokyo

• MAEDA Hiroyuki

  Departhents of Biochemistry and Surgery, Fukui Medical School

• Yamamoto Nobuki

  Department of Physics, Okayama University, Okayama 700-8530, Japan

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