Specific heat of a regenerator material Er3Ni

Akiko Takahashi, Yoichi Tokai, Masashi Sahashi, Takasu Hashimoto

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Specific heat measurement was performed in the temperature range from 800 mK to 62 K on the regenerator material Er3Ni which is an antiferromagnet with a Neel temperature of 6.1 K and possesses a large volumetric heat capacity even at temperatures above TN. The magnetic contribution to the specific heat has been carefully divided into two parts, one of which is caused by entropy change due to the magnetic ordering and the other a contribution from higher energy level states (Schottky anomaly). The energy levels of the 4f electrons for Er3+ were calculated using the point-charge model, and compared with the experimental data. The entropy change of the Schottky anomaly is large compared with that of magnetic ordering and important for the regenerator material.

Original languageEnglish
Pages (from-to)1023-1026
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume33
Issue number2
DOIs
Publication statusPublished - 1994

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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