Stuffed Rare-Earth Garnets

Chen Yang; Lun Jin; Weiwei Xie; Robert J Cava

doi:10.1021/acs.inorgchem.3c03453

Stuffed Rare-Earth Garnets

Inorg Chem. 2023 Dec 25;62(51):21364-21370. doi: 10.1021/acs.inorgchem.3c03453. Epub 2023 Dec 5.

Authors

Chen Yang^{1

2}, Lun Jin¹, Weiwei Xie³, Robert J Cava¹

Affiliations

¹ Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
² Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States.
³ Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States.

PMID: 38052094
DOI: 10.1021/acs.inorgchem.3c03453

Abstract

We report the synthesis and magnetic characterization of stuffed rare-earth gallium garnets, RE_3+xGa_5-xO₁₂ (RE = Lu, Yb, Er, Dy, Gd), for x up to 0.5. The excess rare-earth ions partly fill the octahedral sites normally fully occupied by Ga³⁺, forming disordered pairs of corner-shared face-sharing magnetic tetrahedra. The Curie-Weiss constants and observed effective moments per rare-earth are smaller than are seen for the unstuffed gallium garnets. No significant change in the field-dependent magnetization is observed but missing entropy is seen when integrating the heat capacity down to 0.5 K.