Crystal Growth and Physical Properties of Hybrid CoSn-YCo6Ge6 Structure Type LnxCo3(Ge1- ySny)3 (Ln = Y, Gd)

Moisés Bravo; Gregory T McCandless; Ryan E Baumbach; Yaojia Wang; Mazhar N Ali; Julia Y Chan

doi:10.1021/acs.inorgchem.3c02172

Crystal Growth and Physical Properties of Hybrid CoSn-YCo₆Ge₆ Structure Type Ln_xCo₃(Ge_{1- y}Sn_y)₃ (Ln = Y, Gd)

Inorg Chem. 2023 Nov 6;62(44):18049-18055. doi: 10.1021/acs.inorgchem.3c02172. Epub 2023 Oct 23.

Authors

Moisés Bravo¹, Gregory T McCandless¹, Ryan E Baumbach², Yaojia Wang^{1

3}, Mazhar N Ali^{1

3}, Julia Y Chan¹

Affiliations

¹ Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798, United States.
² National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States.
³ Kavli Institute of Nanoscience, Delft University of Technology, Delft 2628 CJ, The Netherlands.

PMID: 37870243
DOI: 10.1021/acs.inorgchem.3c02172

Abstract

There is an ongoing interest in kagome materials because they offer tunable platforms at the intersection of magnetism and electron correlation. Herein, we examine single crystals of new kagome materials, Ln_xCo₃(Ge_1-ySn_y)₃ (Ln = Y, Gd; y = 0.11, 0.133), which were produced using the Sn flux-growth method. Unlike many of the related chemical analogues with the LnM₆X₆ formula (M = transition metal and X = Ge, Sn), the Y and Gd analogues crystallize in a hybrid YCo₆Ge₆/CoSn structure, with Sn substitution. While the Y analogue displays temperature-independent paramagnetism, magnetic measurements of the Gd analogue reveal a magnetic moment of 8.48 μ_B, indicating a contribution from both Gd and Co. Through anisotropic magnetic measurements, the direction of Co-magnetism can be inferred to be in plane with the kagome net, as the Co contribution is only along H//a. Crystal growth and structure determination of Y_xCo₃(Ge,Sn)₃ and Gd_xCo₃(Ge,Sn)₃, two new hybrid kagome materials of the CoSn and YCo₆Ge₆ structure types. Magnetic properties, heat capacity, and resistivity on single crystals are reported.