TY - GEN
T1 - Influence of co-doping on the crystal structure, magnetocaloric properties and elastic moduli of the la(Fe, si)13 compound
AU - Huang, Dan
AU - Kou, Ronghui
AU - Gao, Jianrong
AU - Haglund, Amanda
AU - Yan, Jiaqiang
AU - Keppens, Veerle
AU - Mandrus, David
AU - Ren, Yang
N1 - Publisher Copyright:
© The Minerals, Metals & Materials Society 2018.
PY - 2018
Y1 - 2018
N2 - Abstract The La(Fe, Si)13 compound shows a large magnetocaloric effect near room temperature. Partial substitution of Co for Fe can raise its Curie temperature and reduce the thermal hysteresis of its ferromagnetic transition. However, the influence of Co substitution on the crystal structure and magnetocaloric properties of La(Fe, Si)13 is not well understood yet. In this work, we report a comparative study of the crystal structure, magnetocaloric effects and elastic moduli of polycrystalline LaFe11.5 Si1.5 and LaCoFe10.5 Si1.5 samples using synchrotron radiation X-ray diffraction, magnetic measurements and resonant ultrasound spectroscopy. Compared to the Co-free sample, the Co-doped sample shows a sluggish ferromagnetic transition and reduced volumetric expansion as well as softer elastic moduli at room temperature. The Co-doped sample also shows stronger temperature dependence of Fe-Fe distances in its ferromagnetic state. Such differences between the samples are explained by considering the influence of Co doping on ferromagnetic interactions and lattice entropy.
AB - Abstract The La(Fe, Si)13 compound shows a large magnetocaloric effect near room temperature. Partial substitution of Co for Fe can raise its Curie temperature and reduce the thermal hysteresis of its ferromagnetic transition. However, the influence of Co substitution on the crystal structure and magnetocaloric properties of La(Fe, Si)13 is not well understood yet. In this work, we report a comparative study of the crystal structure, magnetocaloric effects and elastic moduli of polycrystalline LaFe11.5 Si1.5 and LaCoFe10.5 Si1.5 samples using synchrotron radiation X-ray diffraction, magnetic measurements and resonant ultrasound spectroscopy. Compared to the Co-free sample, the Co-doped sample shows a sluggish ferromagnetic transition and reduced volumetric expansion as well as softer elastic moduli at room temperature. The Co-doped sample also shows stronger temperature dependence of Fe-Fe distances in its ferromagnetic state. Such differences between the samples are explained by considering the influence of Co doping on ferromagnetic interactions and lattice entropy.
KW - Crystal structure
KW - Elastic moduli
KW - La(FeSi)
KW - Magnetocaloric effect
UR - http://www.scopus.com/inward/record.url?scp=85044475846&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-72526-0_17
DO - 10.1007/978-3-319-72526-0_17
M3 - Conference contribution
AN - SCOPUS:85044475846
SN - 9783319725253
T3 - Minerals, Metals and Materials Series
SP - 181
EP - 190
BT - TMS 2018 147th Annual Meeting and Exhibition Supplemental Proceedings
PB - Springer International Publishing
T2 - 147th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2018
Y2 - 11 March 2018 through 15 March 2018
ER -