Direct observation of the ground state of a 1/3 quantum magnetization plateau in SrMn$_3$P$_4$O$_{14}$ using neutron diffraction measurements

TL;DR

This study used neutron diffraction to directly observe the ground state of a 1/3 magnetization plateau in SrMn₃P₄O₁₄, confirming theoretical models and providing new insights into quantum magnetization plateaus.

Contribution

The paper presents the first direct observation of a plateau ground state in SrMn₃P₄O₁₄ using neutron diffraction, validating the isolated-trimer model.

Findings

Magnetic reflections match the isolated-trimer model predictions.

Successful direct observation of the plateau ground state.

Confirmation of theoretical models for quantum magnetization plateaus.

Abstract

We can directly investigate the ground state in magnetization-plateau fields (plateau ground state) using neutron diffraction measurements. We performed neutron diffraction measurements on the spin-5/2 trimer substance SrMn$_3$P$_4$O$_{14}$ in magnetization-plateau fields. The integrated intensities of magnetic reflections calculated using an expectation value of each spin in a plateau ground state of an isolated-trimer model agree well with those obtained experimentally in the magnetization-plateau fields. We succeeded in direct observation of a plateau ground state in SrMn$_3$P$_4$O$_{14}$.