Paramagnetic magnetostriction in the chiral magnet CrNb3S6 at room temperature

被引：6

作者：

Mito, Masaki ^{[1
,2
]}

Tajiri, Takayuki ^{[3
]}

Kousaka, Yusuke ^{[2
,4
]}

Togawa, Yoshihiko ^{[2
,4
]}

Akimitsu, Jun ^{[5
]}

Kishine, Jun-ichiro ^{[2
,6
]}

Inoue, Katsuya ^{[2
,7
,8
]}

机构：

[1] Kyushu Inst Technol, Grad Sch Engn, Kitakyushu, Fukuoka 8048550, Japan

[2] Hiroshima Univ, Chiral Res Ctr, Higashihiroshima 7398526, Japan

[3] Fukuoka Univ, Fac Sci, Fukuoka 8140180, Japan

[4] Osaka Prefecture Univ, Grad Sch Engn, Sakai, Osaka 5998570, Japan

[5] Okayama Univ, Res Inst Interdisciplinary Sci, Okayama 7008530, Japan

[6] Open Univ Japan, Grad Sch Arts & Sci, Chiba 2618586, Japan

[7] Hiroshima Univ, Grad Sch Sci, Higashihiroshima 7398526, Japan

[8] Hiroshima Univ, Inst Adv Mat Res, Higashihiroshima 7398526, Japan

来源：

PHYSICAL REVIEW B | 2022年 / 105卷 / 10期

关键词：

THERMAL-EXPANSION; FIELD; TRANSITION; PHASE;

D O I：

10.1103/PhysRevB.105.104412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report that the magnetostriction (MS) effects occur in a paramagnetic state of a chiral magnet CrNb3S6. Through a series of experimental tests at room temperature, structural changes were observed at the level of a unit cell. The structural parameters are dependent of the strength and direction of magnetic field (H) even at temperature excessively higher than the magnetic ordering temperature T-c of 127 K. The present paramagnetic MS prominently appeared under H parallel to the ab plane (easy plane) as opposed to under H parallel to the c axis. Features observed in the paramagnetic MS effect significantly differ from those of the spontaneous MS in the vicinity of T-c [Phys. Rev. B 102, 014446 (2020)]. In this material, the orbital angular momentum L of Cr originates from the hybridization between Cr and Nb, and L is strongly coupled with the crystal structure [Phys. Rev. B 99, 174439 (2019)]. The present study clarified that the symmetry of the CrS6 octahedron is sensitive to H even at room temperature. The paramagnetic spin-orbit coupling should induce the distortion of CrS(6)( )octahedron, resulting in the changes in Cr-Nb(4f) distance via the change in the hybridization between Cr-a(1g) and Nb-4d(z)2 orbitals.

引用

页数：8