Enhanced magnetic frustration in a new high entropy diamond lattice spinel oxide

Sourav Marik (1, 2) , Deepak Singh (3) , Bruno Gonano (2, 4) , Fabien Veillon (2) , D. Pelloquin (2) , Yohann Breard (2)

1 TIET - Thapar Institute of Engineering and Technology [Patiala, Inde]
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 ISIS Facility
4 UiO - University of Oslo

High‐entropy stabilization chemistry offers a new paradigm in the design of functional materials stabilized by the high configurational entropy. In the present work, a new high entropy spinel material with composition (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)Al2O4 is introduced, detailed structural and microstructural characterizations highlight that the material crystallizes in a cubic spinel structure with an excellent chemical homogeneity at the nanoscale. Magnetic studies show that the frustration (magnetic) parameter (f =│θCW│/TM> 27) is significantly enhanced in this new diamond lattice spinel material.

Mots clés: High entropy oxides; Spinel; Magneto-(di)electric effect

Domaines: Matériaux; Matière Condensée [cond-mat]

Sourav Marik, Deepak Singh, Bruno Gonano, Fabien Veillon, D. Pelloquin, et al.. Enhanced magnetic frustration in a new high entropy diamond lattice spinel oxide. Scripta Materialia, 2020, 186, pp.366-369. ⟨10.1016/j.scriptamat.2020.04.027⟩. ⟨hal-03016471⟩