Robust pinned magnetisation in A2Ir2O7 iridates, the case of Er2Ir2O7 and Lu2Ir2O7 flux-grown single crystals

TL;DR

This study reports the synthesis and magnetic characterization of high-quality Lu2Ir2O7 and Er2Ir2O7 single crystals, revealing a robust ferromagnetic component within an antiferromagnetic all-in-all-out order, advancing understanding of magnetic domains in pyrochlore iridates.

Contribution

First synthesis and magnetic analysis of Lu2Ir2O7 and Er2Ir2O7 single crystals, highlighting the coexistence of ferromagnetic and antiferromagnetic order in pyrochlore iridates.

Findings

Presence of a robust ferromagnetic component in the magnetic order.

Discussion of magnetic domains and interfaces in frustrated lattices.

Confirmation of all-in-all-out antiferromagnetic order.

Abstract

Reliable and profound studies of actual magnetic domain structure in rare-earth A2Ir2O7 pyrochlore iridates are frequently limited by insufficient sample quality or lack of single crystals. We report the magnetic properties of the for-the-first-time synthesised Lu2Ir2O7 and Er2Ir2O7 single-crystals. The paper is focused on the robust ferromagnetic component of magnetisation present in the material with the antiferromagnetically ordered state of the all-in-all-out (AIAO) type, and is discussed in the framework of AIAO and AOAI domains and interfaces on the geometrically frustrated lattice.