Quantum fluctuations associated with first-order magnetic transition in a frustrated kagome lattice antiferromagnet

TL;DR

This paper reports a first-order magnetic transition in a frustrated kagome-lattice antiferromagnet, revealing significant quantum fluctuations and a 1/2 magnetization plateau, advancing understanding of quantum states in geometrically frustrated systems.

Contribution

It uncovers a novel first-order magnetic transition in Nd3ScBi5 with associated quantum fluctuations and magnetocaloric effects, highlighting a new phase in kagome-lattice antiferromagnets.

Findings

Observation of isosymmetric first-order magnetic transition

Detection of a 1/2 magnetization plateau phase

Significant quantum fluctuations and latent heat

Abstract

Intense quantum fluctuations arising from geometrical frustrations in kagome-lattice magnets provide a feasible approach to exotic quantum states. Here, we document an unexpected isosymmetric first-order magnetic transition in the recently synthesized frustrated kagome-lattice antiferromagnet Nd3ScBi5, which is characterized by significant latent heat and a pronounced magnetocaloric effect, as well as discontinuous Raman shifts and negligible hysteresis. Employing the magnetocaloric effect as a detection method, in conjunction with systematical field-dependent physical properties, we uncover a distinctive 1/2 magnetization plateau phase with significant quantum fluctuations. Our study unveils Nd3ScBi5 as a prototypical model with an emerging phase of enhanced quantum fluctuations triggered by first-order magnetic transitions.