Eur. Phys. J. Appl. Phys.
Volume 33, Number 2, February 2006
|Page(s)||103 - 107|
|Section||Magnetism and Superconductivity|
|Published online||08 February 2006|
Thermal expansion anomaly and magnetic properties of Nd2AlFe16−xMnx compounds
Department of Physics, Tianjin Normal University, Tianjin, 300074, P.R. China
2 Department of Physics, Shandong University, Jinan, 250100, P.R. China
Corresponding author: firstname.lastname@example.org
Revised: 13 September 2005
Accepted: 25 October 2005
Published online: 8 February 2006
The structural and magnetic properties of Nd2AlFe16−xMnx (x = 1, 2, 3, 4, and 5) compounds have been investigated by means of X-ray diffraction and magnetization measurements. The Nd2AlFe16−xMnx compounds have a rhomhedral Th2Zn17-type structure. There exist an anisotropic strong spontaneous magnetostriction in magnetic state and a negative thermal expansion near their Curie temperatures. The nearly zero thermal expansion coefficient is found over a broad temperature range including room temperature from 103 to 342 K for Nd2AlFe15Mn compound. In the magnetic state, the thermal expansion coefficients of Nd2AlFe16−xMnx compounds increase with the increasing Mn concentrations x. Mn concentration dependences of the lattice parameters and unit-cell volume, the spontaneous magnetostrictive deformation, the Curie temperature, and the saturation magnetization have been discussed.
PACS: 87.59.Dj – Angiography / 75.30.Et – Exchange and superexchange interactions / 75.60.Ej – Magnetization curves, hysteresis, Barkhausen and related effects
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.