4.5 Article

Anisotropy of the magnetocaloric effect in DyNiAl

期刊

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 15, 页码 2318-2321

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2009.02.118

关键词

Magnetocaloric effect; DyNiAl; Magnetism; Anisotropy

资金

  1. Grant Agency of the Czech Republic [202/08/0711]
  2. Grant Agency of the Charles University [21108]
  3. Ministry of Education of the Czech Republic [MSM 0021620834]

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We present study of the anisotropic magnetocaloric effect in DyNiAl. This compound crystallizes in the hexagonal ZrNiAl-type structure, orders magnetically below T(C) = 31 K and undergoes a further magnetic phase transition at T(1) = 15 K. The Dy-moments are aligned ferromagnetically along the hexagonal c-axis below T(C), the additional antiferromagnetic component develops within the basal plane below T(1). The magnetocaloric effect was evaluated from the magnetization measurements with field applied along the c-axis and perpendicular to it. Our data reveal a strong anisotropy of the magnetocaloric effect. The large effect occurs for field applied along the c-axis whereas the entropy change is small for the perpendicular field direction. (C) 2009 Elsevier B.V. All rights reserved.

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