Journal of Magnetism and Magnetic Materials, ( ISI ), Volume (2014), No (363), Year (2014-5) , Pages (188-194)

Title : ( Magnetostriction and thermal expansion of HoFe 11  x Co x Ti intermetallic compounds )

Authors: , Nasser Tajabor , Leili Motevali zadeh naeini , D. Fruchart ,

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The thermal expansion and magnetostriction of the HoFe11xCoxTi (0rxr11) alloys have been investigated, using the strain gauge technique in the temperature range 77–600 K. Both thermal expansion and thermal expansion coefficient exhibit an anomalous behaviour and Invar effect below Curie temperature (TC¼516 K) in sample with x¼0. The increase of x in HoFe11xCoxTi system leads to disappearing of the Invar effect and increasing of the average thermal expansion coefficient from 6.370106 K1 in x¼0 to 10.735106 K1 in x¼11 below room temperature. In addition, the spontaneous volume magnetostriction decreases with Co content. The magnetostriction compensation point is observed in the anisotropic magnetostriction curve of all samples. The maximum value of anisotropic magnetostriction (ΔλE50106) at room temperature is observed in sample with x¼9. The saturation behaviour only appears in samples with x¼5, 7 and 9. In samples with x¼3, 5 and 7, a noticeable volume magnetostriction (ΔV/V) is observed in low temperature due to first-order magnetisation process. Moreover, ΔV/V exhibits a large anomaly about 45106 and 20106 around room temperature related to spin reorientation transition in samples with x¼9 and 11, respectively. The results are discussed based on the local magnetic moment model and irreducible magnetoelastic coupling modes.


, Rare-earth intermetallics , Thermal expansion, Magnetostriction, Magnetovolume effect
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author = {, and Tajabor, Nasser and Motevali Zadeh Naeini, Leili and D. Fruchart},
title = {Magnetostriction and thermal expansion of HoFe 11  x Co x Ti intermetallic compounds},
journal = {Journal of Magnetism and Magnetic Materials},
year = {2014},
volume = {2014},
number = {363},
month = {May},
issn = {0304-8853},
pages = {188--194},
numpages = {6},
keywords = {Rare-earth intermetallics ;Thermal expansion; Magnetostriction; Magnetovolume effect},


%0 Journal Article
%T Magnetostriction and thermal expansion of HoFe 11  x Co x Ti intermetallic compounds
%A ,
%A Tajabor, Nasser
%A Motevali Zadeh Naeini, Leili
%A D. Fruchart
%J Journal of Magnetism and Magnetic Materials
%@ 0304-8853
%D 2014