Magnetic Properties of the low dimensional BaM$_2$Si$_2$O$_7$(M= Cu, Co,   Mn) system

G. H. Wang (1); C. Y. Xu (1); H. B. Cao (2); T. Hong (2); Q. Huang; (3); Q. Y. Ren (1); J. Q. Xu (1); H. D. Zhou (1; 3); W. D. Luo (1; 4 and; 5); D. Qian (1; 4); and J. Ma (1; 4) ((1) Key laboratory of Artificial; Structures; Quantum Control; School of Physics; Astronomy; Shanghai; JiaoTong University,(2) Quantum Condensed Matter Division; Oak Ridge National; Laboratory,(3) Department of Physics; Astronomy; University of; Tennessee,(4) Collaborative Innovation Center of Advanced Microstructures,; (5) Institute of Natural Sciences; Shanghai Jiao Tong University)

arXiv:1807.06883·cond-mat.str-el·July 31, 2019

Magnetic Properties of the low dimensional BaM$_2$Si$_2$O$_7$(M= Cu, Co, Mn) system

G. H. Wang (1), C. Y. Xu (1), H. B. Cao (2), T. Hong (2), Q. Huang, (3), Q. Y. Ren (1), J. Q. Xu (1), H. D. Zhou (1, 3), W. D. Luo (1, 4 and, 5), D. Qian (1, 4), and J. Ma (1, 4) ((1) Key laboratory of Artificial, Structures, Quantum Control, School of Physics, Astronomy

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TL;DR

This study investigates the magnetic properties of the BaM$_2$Si$_2$O$_7$ system with M=Cu, Co, Mn, revealing distinct magnetic behaviors and phase transitions through experimental measurements and computational analysis.

Contribution

It provides a comprehensive experimental and theoretical analysis of the magnetic structures and interactions in the BaM$_2$Si$_2$O$_7$ system, highlighting differences among M=Cu, Co, Mn.

Findings

01

Identified a spin flop transition around 6 T in BaMn$_2$Si$_2$O$_7$.

02

Confirmed ferrimagnetic-like magnetism in BaCo$_2$Si$_2$O$_7$.

03

Compared magnetic exchange interactions across different M elements.

Abstract

We performed susceptibility, magnetization, specific heat, and single crystal neutron diffraction measurements on single crystalline BaMn $_{2}$ Si $_{2}$ O $_{7}$ . Based on the results, we revisited its spin structure with a more accurate solution and constructed a magnetic phase diagram with applied field along the $b$ -axis, which contains a spin flop transition around 6 T. We also used susceptibility, magnetization, and specific heat results confirmed the ferrimagnetic-like magnetism in polycrystalline BaCo $_{2}$ Si $_{2}$ O $_{7}$ . Furthermore, we performed LSDA + U calculations for the BaM $_{2}$ Si $_{2}$ O $_{7}$ (M = Cu, Co, and Mn) system. Our discussions based on the comparison among the obtained magnetic exchange interactions suggest the different structures and electronic configurations are the reasons for the different magnetic properties among the system members.

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