Magnetic instabilities in quasi-one-dimensional Cr-based material

TL;DR

This study investigates the magnetic properties of K2Cr3As3, revealing a transition from diamagnetism to ferrimagnetism below 60 K and observing spike-like magnetization jumps indicative of magnetic instabilities.

Contribution

The paper provides new experimental insights into the temperature-dependent magnetic behavior and instabilities in a quasi-one-dimensional Cr-based material.

Findings

Diamagnetic behavior above 60 K

Ferrimagnetic hysteresis below 60 K

Spike-like magnetization jumps at various fields

Abstract

The magnetic response of a K2Cr3As3 sample has been studied by means of dc magnetization measurements as a function of magnetic field (H) at different temperatures ranging from 5 K up to 300 K. Looking at the magnetic hysteresis loops m(H), a diamagnetic behavior of the sample has been inferred at temperatures higher than 60 K, whereas at lower temperatures the sample shows a hysteresis loop compatible with the presence of ferrimagnetism. Moreover, several spike-like magnetization jumps, both positive and negative, have been observed at certain fields in the range -1000 Oe < H < 1000 Oe, regardless of the temperature considered. The field position of the magnetization jumps has been studied at different temperatures, and their distribution can be described by a Lorentzian curve.