Research and development of 3d multinary functional materials for substitution of rare and toxic elements

Asaya Fujita, Shun Fujieda, Yoichi Nishino, Koichi Tsuchiya, Takashi Fukuda, Koshi Takenaka, Ryosuke Kainuma, Kazuaki Fukamichi

Research output: Contribution to journalArticle

Abstract

Research and development of 3d multinary alloys and compounds for functional materials in terms of substitution of materials containing rare and toxic elements have been carried out extensively. Fe 2VAl Heusler alloy and its related alloys exhibit a large Seebeck coefficient, therefore, these alloys have a potential as a substitute of the Bi-Te system for room-temperature thermoelectric materials. Furthermore, Pb-Zn-Te electrostrictive and TbFe 2-based magnetostrictive materials are probably replaced with Ni-based magnetic shape memory Heusler alloys, which exhibit a large magnetic-field induced strain. In addition, the control of a large negative thermal expansion of Mn 3XN (X = Zn, Ga)anti-Perovskite compounds by partial substitution is useful way to overcome a usage of expensive W element and its compounds. Finally, we focus on magnetic refrigerants which are keenly desired in utilization of magnetic refrigeration. The existing candidates for magnetic refrigerants are limited to compounds containing elements such as As, Gd and Sb. On the other hand, La (Fe xSi 1-x) 13 compounds offer advantages on account of environmental safety, low-prices, and a large magnetocaloric effects. To utilize these 3d-based functional materials by taking advantage of the ability to control the electronic state in multinary system, the material designs based on electronic structures and supports of computer-aided phase diagrams are highly useful.

Original languageEnglish
Pages (from-to)876-884
Number of pages9
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume71
Issue number10
DOIs
Publication statusPublished - 2007 Oct 1

Keywords

  • Anti-Perovskite compound
  • Functional material
  • Heusler alloy
  • Magnetic refrigerant
  • Magnetic shape memory alloy
  • Magnetocaloric effect
  • Negative thermal expansion
  • Seebeck coefficient
  • Substitution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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