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Author Betancourth, D.; Correa, V.F.; García, D.J.
Title (up) Evidence of a Low Energy Anisotropy in GdCoIn_5 Type Journal Article
Year 2015 Publication Journal of Low Temperature Physics Abbreviated Journal J. Low Temp. Phys.
Volume 179 Issue 1-2 Pages 90-93
Keywords Rare earth magnetism; Antiferromagnetic transition; Anisotropy
Abstract We investigate the effects of an applied magnetic field on the magnetic properties of the antiferromagnet GdCoIn 5 . The prominent anisotropy observed in the susceptibility below TN is rapidly suppressed by a field of just a few Tesla. Further evidence of this low energy-scale is obtained from magnetoresistance and magnetostriction experiments. The lattice length, particularly, shows a sudden change below 2 T when the magnetic field is applied perpendicular to the crystallographic c^ -axis.
Address
Corporate Author Thesis
Publisher Springer US Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-2291 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 710
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Author Carreras Oropesa, W.G.; Correa, V.F.; Sereni, J.G.; García, D.J.; Cornaglia, P.S.
Title (up) Landau theory for magnetic and structural transitions in CeCo0.85Fe0.15Si Type Journal Article
Year 2018 Publication Journal of Physics: Condensed Matter Abbreviated Journal J. Phys.: Condens. Matter
Volume 30 Issue Pages 295803
Keywords
Abstract We present a phenomenological analysis of the magnetoelastic properties of CeCo0.85Fe0.15Si

at temperatures close to the Néel transition temperature TN. Using a Landau functional we

provide a qualitative description of the thermal expansion, magnetostriction, magnetization

and specific heat data. We show that the available experimental results (Correa et al 2016 J.

Phys.: Condens. Matter 28 346003) are consistent with the presence of a structural transition

at Ts  TN and a strong magnetoelastic coupling. The magnetoelastic coupling presents a

Janus-faced effect: while the structural transition is shifted to higher temperatures as the

magnetic field is increased, the resulting striction at low temperatures decreases. The strong

magnetoelastic coupling and the proximity of the structural transition to the onset temperature

for magnetic fluctuations, suggest that the transition could be an analogue of the tetragonal to

orthorhombic observed in Fe-based pcnictides.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ victor.correa @ Serial 796
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