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Author (up) Carreras Oropesa, W.G.; Correa, V.F.; Sereni, J.G.; García, D.J.; Cornaglia, P.S. url  doi
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  Title 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.		  
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  Notes Approved no  
  Call Number BT @ victor.correa @ Serial 796  
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