Anomalous finite-size effect on the magnetostructural transition in CrN

Wang, Lingfei1,2; Xu, Wenwen1,2; Zhou, Xuefeng1,2; Gu, Chao1,2; Cheng, Hu1,2; Chen, Jian1,2; Wu, Liusuo1,2,3; Zhu, Jinlong1,2,3; Zhao, Yusheng1,2; Guo, Er-Jia4,5; Wang, Shanmin1,2,3

2023-05-25

10.1103/PhysRevB.107.174112

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

We report a systematic investigation of the finite-size effect on magnetostructural transition in CrN based on a series of nanoparticle samples with various sizes prepared by a high-pressure method, leading to the discovery of anomalous critical behaviors near transition, especially for spin correlation length. Such critical anomalies are presumably attributed to the strong spin-lattice coupling in this nitride, because the spin correlation of fluctuation can be greatly affected by the concurrent structural distortion. Using the conventional Gibbs-Thomson theorem and size-dependent effect, the scaling relationship between transition temperature and spin correlation length is deduced by involving a term of the transition-induced volume change that rationalizes the role that the lattice degree of freedom played during magnetic ordering. A phenomenological model is also established for understanding the kinetics and dynamics of magnetic fluctuation at transition in a finite-size system. In addition, our results also show that CrN nanoparticles possess a compressed surface shell, which can be described by Laplace pressure, obeying a unique 1/d(1.8) finite-size scaling law.

SCI ; EI

英语

第一 ; 通讯

National Natural Sci- ence Foundation of China["12174175","11974157"] ; Guangdong Basic and Applied Ba- sic Research Foundation[2022B1515120014] ; Shenzhen Basic Research Fund["JCYJ20190809173213150","20220815101116001"]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001003448500003

AMER PHYSICAL SOC

20232314203904

Degrees of freedom (mechanics) ; High pressure effects ; Nanoparticles ; Nitrogen compounds

Nanotechnology:761 ; Mechanics:931.1 ; Solid State Physics:933

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Guangdong, Peoples R China
3.Quantum Sci Ctr Guangdong Hongkong Macao Greater B, Shenzhen 518045, Guangdong, Peoples R China
4.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

Wang, Lingfei,Xu, Wenwen,Zhou, Xuefeng,et al. Anomalous finite-size effect on the magnetostructural transition in CrN[J]. PHYSICAL REVIEW B,2023,107(17).

Wang, Lingfei.,Xu, Wenwen.,Zhou, Xuefeng.,Gu, Chao.,Cheng, Hu.,...&Wang, Shanmin.(2023).Anomalous finite-size effect on the magnetostructural transition in CrN.PHYSICAL REVIEW B,107(17).

Wang, Lingfei,et al."Anomalous finite-size effect on the magnetostructural transition in CrN".PHYSICAL REVIEW B 107.17(2023).