Anisotropy induced anomalies in Dy1$-$xTbxAl2

Khan, M.; Pathak, A. K.; Mudryk, Y.; Pecharsky, V. K.

doi:10.1039/C6TC05384J

Anisotropy induced anomalies in Dy_1$$-$$xTb_xAl₂

Journal Article · Mon Jan 02 00:00:00 EST 2017 · Journal of Materials Chemistry. C

DOI:https://doi.org/10.1039/C6TC05384J· OSTI ID:1355404

Khan, M. ^[1]; Pathak, A. K. ^[1]; Mudryk, Y. ^[1]; Pecharsky, V. K. ^[2]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering

The Dy_1$$-$$xTb_xAl₂ alloys have been investigated by X-ray powder diffraction, heat capacity, and magnetic measurements. All samples exhibit cubic Laves phase crystal structure at room temperature but at T_C, DyAl2 and TbAl₂ show tetragonal and rhombohedral distortions, respectively. First order phase transitions are observed below T_C (at the spin-reorientation transition, T_SR) in the alloys with 0.15 ≤ x ≤ 0.35. These transitions are signified by sharp heat capacity peaks and corresponding anomalies in the magnetization and ac magnetic susceptibility data. The observations are interpreted by taking into consideration the differences in easy magnetization directions of DyAl₂ and TbAl₂. Due to the competing magnetic structures, the anisotropy-related instability and magnetic frustrations are prominent in the Dy_1$$-$$xTb_xAl₂ alloys at certain concentrations resulting in the first order transitions.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1355404

Report Number(s):: IS-J--9258

Journal Information:: Journal of Materials Chemistry. C, Journal Name: Journal of Materials Chemistry. C Journal Issue: 4 Vol. 5; ISSN JMCCCX; ISSN 2050-7526

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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