Huge magnetostriction in superconducting single-crystalline BaFe$_{1.908}$Ni$_{0.092}$As$_{2}$

Minjie Zhang; Jiating Wu; Ke Shi; Langsheng Ling; Wei Tong; Chuanying Xi; Li Pi; J. Wosnitza; Huiqian Luo; Zhaosheng Wang

doi:10.1063/5.0166209

paper

Huge magnetostriction in superconducting single-crystalline BaFe $_{1.908}$ Ni $_{0.092}$ As $_{2}$

arXiv:2308.10492 · doi:10.1063/5.0166209

Abstract

The performance of iron-based superconductors in high magnetic fields plays an important role for their practical application. In this work, we measured the magnetostriction and magnetization of BaFe $_{1.908}$ Ni $_{0.092}$ As $_{2}$ single crystals using pulsed magnetic fields up to 60 T and static magnetic fields up to 33 T, respectively. A huge longitudinal magnetostriction (of the order of 10 $^{- 4}$ ) was observed in the direction of the twin boundaries. The magnetization measurements evidence a high critical-current density due to strong bulk pinning. By using magnetization data with an exponential flux-pinning model, we can reproduce the magnetostriction curves qualitatively. This result shows that the magnetostriction of BaFe $_{1.908}$ Ni $_{0.092}$ As $_{2}$ can be well explained by a flux-pinning-induced mechanism.

4 pages, 3 figures

Huge magnetostriction in superconducting single-crystalline BaFe1.908​Ni0.092​As2​

Abstract

Huge magnetostriction in superconducting single-crystalline BaFe $_{1.908}$ Ni $_{0.092}$ As $_{2}$