Specific heat and neutron diffraction study on quaternary sulfides BaNd2CoS5 and BaNd2ZnS5

Makoto Wakeshima, Nobuyuki Taira, Yukio Hinatsu, Aya Tobo, Kenji Ohoyama, Yasuo Yamaguchi

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetic and electrical properties are investigated for quaternary neodymium sulfides BaNd2TS5 (T=Co, Zn) through the specific heat, neutron diffraction, and electrical conductivity measurements. Their electrical conductivities show semiconductive behavior, which follows the Arrhenius temperature dependence with the activation energy of Ea=1.46eV for BaNd2ZnS5 and Ea=1.19eV for BaNd2CoS5. The specific heat of BaNd2ZnS5 has a λ-type anomaly at 2.8K due to the antiferromagnetic ordering of the Nd3+ moments and a Schottky-type anomaly at around 60K, which results from the crystal field splitting of the 4I9/2 ground state of the Nd3+ ion. The specific heat of BaNd2CoS5 shows two λ-type anomalies at 5.7K due to the antiferromagnetic ordering of Nd3+ and at 58K due to the antiferromagnetic ordering of Co2+. The latter overlaps with the Schottky-type anomaly due to the crystal field splitting of the Nd3+ ion. Neutron diffraction measurements for BaNd2CoS5 show that a magnetic arrangement of the Co2+ moments has a collinear antiferromagnetic structure, while that of the Nd3+ moments has a noncollinear one.

Original languageEnglish
Pages (from-to)159-164
Number of pages6
JournalJournal of Solid State Chemistry
Volume174
Issue number1
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Antiferromagnetic transition
  • Magnetic structure
  • Neutron diffraction
  • Quaternary sulfide
  • Specific heat

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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