Crystallographic Disorder and Strong Magnetic Anisotropy in Dy3.1Pt2.0Sb3.8

TL;DR

This study reports the synthesis and detailed magnetic characterization of Dy3.00(1)Pt2Sb4.48(2), revealing crystallographic disorder, complex magnetic ordering, and strong anisotropy, offering insights into the interplay between structure and magnetism in rare-earth compounds.

Contribution

It introduces a new Dy-based compound with unique structural disorder and magnetic properties, expanding understanding of structure-magnetism relationships.

Findings

Crystallographic disorder observed in Dy3.00(1)Pt2Sb4.48(2)

Antiferromagnetic order around 15 K with multiple sublattices

Strong magnetic anisotropy and metamagnetic transitions

Abstract

We report the crystal growth and characterization of a rare-earth-containing material, Dy3.00(1)Pt2Sb4.48(2). This compound possesses a similar structure to the previously reported Y3Pt4Ge6, but lacks two layers of Pt atoms. Crystallographic disorder was found in Dy3.00(1)Pt2Sb4.48(2). Additionally, the Dy-Dy framework was found to have both square net and triangular lattices. Dy3.00(1)Pt2Sb4.48(2)8 was determined to be antiferromagnetically ordered around ~15 K while a competing antiferromagnetic sublattice also exists at lower temperature. Strong magnetic anisotropy was observed and several metamagnetic transitions were seen in the hysteresis loops. Furthermore, the Curie-Weiss fitting revealed unusually small effective moment of Dy, which is far below the expected value of Dy3+ (10.65 muB). This material might provide a new platform to study the relation between crystallographic disorder and magnetism.