Negative thermal expansion of the Ho2AlFe14Mn2 compound | Zendy

Hao Yan-Ming | Zendy; Cui Chun-Xing | Zendy; Fanbin Meng | Zendy

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Negative thermal expansion of the Ho2AlFe14Mn2 compound

Author(s) -

Hao Yan-Ming,

Cui Chun-Xing,

Fanbin Meng

Publication year - 2003

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.52.999

Subject(s) - thermal expansion , negative thermal expansion , magnetostriction , materials science , diffraction , condensed matter physics , thermal , hexagonal crystal system , volume (thermodynamics) , crystallography , nuclear magnetic resonance , thermodynamics , composite material , chemistry , optics , magnetic field , physics , quantum mechanics

The structure properties of Ho2AlFe16-xMnx compounds have been investigated by means of x-ray diffraction and magnetic measurements. The Ho2AlFe16-xMnx compounds have a hexagonal Th2Ni17-type structure. Their unit-cell volumes increase nonlinear with increasing x. This implies there is a positive spontaneous volume magnetostriction in the magnetic state of these compounds. x-ray diffraction of the Ho2AlFe14Mn2 compound from 160 to 285 K shows that there appears a negative coefficient of thermal expansion from 220 to 270K and the average thermal expansion is -14×10-4·K-1.

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