An emergence of chiral helimagnetism or ferromagnetism governed by Cr intercalation in a dichalcogenide CrNb${}_3$S${}_6$

Abstract

A synthesis of single crystals of chiral dichalcogenides $T{M}_3{X}_6$ ($T$: 3$d$ transition metal, $M$: Nb or Ta, $X$: S or Se) remains an intriguing issue for the investigation of emergent quantum properties such as chiral helimagnetism. In this study, we investigated a correlation between the quantity of Cr intercalation $x$ and magnetic property in single crystals of a chromium (Cr) intercalated chiral disulfide Cr${}_x$Nb${}_3$S${}_6$ in order to optimize the synthesis condition for the intercalation-controlled single crystals. The magnetic properties including a magnetic transition temperature $T_c$ take different values depending on the samples. We systematically grew single crystals of Cr${}_x$Nb${}_3$S${}_6$ with $x$ ranged from 0.89 to 1.03 and found that the amount of the Cr intercalation $x$ is an essential factor in controlling the magnetic properties of the grown crystals. The magnetization anomaly, which appears in the temperature dependence as evidence of the formation of chiral magnetic soliton lattice (CSL), was observed only in a narrow region of $x$ from 0.98 to 1.03. The single crystals with $x$ being 0.98 and 0.99 showed the CSL behavior with the highest $T_c$ of 133 K. These results indicate that small amount of defects on the sites for $T$ ions dramatically affects the quality of the single crystals in the synthesis of $T{M}_3$S${}_6$. We also discuss an importance of synthesizing enantiopure single crystals of chiral dichalgogenides in order to observe chiral physical properties unique to chiral compounds such as magneto-chiral effect and chiral-induced spin selectivity.

8 pages, 7 figures

References in corpus (3)

• Tricritical point and phase diagram based on critical scaling in monoaxial chiral helimagnet Cr1/3NbS2
• Structural disorder versus chiral magnetism in Cr${}_{1/3}$NbS${}_2$
• Chirality-Controlled Enantiopure Crystal Growth of a Transition Metal Monosilicide by a Floating Zone Method

Cited by in corpus (8)

• Comparative Electronic Structures of the Chiral Helimagnets Cr1/3NbS2 and Cr1/3TaS2
• Consequences and control of multi-scale (dis)order in chiral magnetic textures
• Persistent spin textures, altermagnetism and charge-to-spin conversion in metallic chiral crystals TM${}_3$X${}_6$
• Surface barrier effect as evidence of chiral soliton lattice formation in chiral dichalcogenide CrTa${}_3$S${}_6$ crystals
• Coexistence of Commensurate and Incommensurate Antiferromagnetic Groundstates in Co${}_x$NbSe${}_2$ Single Crystal
• Field-driven band asymmetry and non-reciprocal transport in a helimagnet
• Spin phase detection by spin current in a chiral helimagnet
• Emergence of Chiral Helimagnetic Order in Chromium-intercalated Tantalum Disulfide CrTa${}_3$S${}_6$ Powders with Controlled Intercalation