Novel ordering of an S = 1/2 quasi one-dimensional Ising-like anitiferromagnet in magnetic field

TL;DR

This study investigates the magnetic phase transitions of BaCo2V2O8, a quasi-one-dimensional Ising-like antiferromagnet, revealing a new incommensurate ordered state induced by magnetic fields up to 12 T.

Contribution

The paper reports the discovery of a novel incommensurate magnetic order in BaCo2V2O8 under high magnetic fields, expanding understanding of field-induced phases in low-dimensional magnetic systems.

Findings

Identified a new magnetic ordered state above 3.9 T

Proposed the order is a novel incommensurate type without classical correspondence

Performed high-field specific heat measurements down to 200 mK

Abstract

High-field specific heat measurements on BaCo2V2O8, which is a good realization of an S = 1/2 quasi one-dimensional Ising-like antifferomagnet, have been performed in magnetic fields up to 12 T along the chain and at temperature down to 200 mK. We have found a new magnetic ordered state in the field-induced phase above Hc ~ 3.9 T. We suggest that a novel type of the incommensurate order, which has no correspondence to the classical spin system, is realized in the field-induced phase.