Magnetic properties of binary alloys Ni<sub>1-x</sub>Mo<sub>x</sub> and Ni<sub>1-y</sub>Cu<sub>y</sub> close to critical concentrations

POSTER

Abstract

The search for the ferromagnetic quantum critical point (FM QCP) has always been a captivating research topic in the scientific community. In pursuit of this goal, we introduced nonmagnetic transition metals to alloy with elemental nickel, and studied the magnetic properties of nickel binary alloys Ni1-xMox and Ni1-yCuy as a function of x and y up to the critical concentrations xcr and ycr at which the FM transition disappears. Tc-x(y) phase diagrams were constructed via the Arrott–Noakes scaling of magnetization data. An enhanced Sommerfeld coefficient (the value of C/T as T→ 0) is observed near xcr and ycr, manifesting the effect of quantum fluctuations. However, the spin glass behavior is identified through the ac magnetic susceptibility measurements. This observation rules out the possibility of the existence of the FM QCP in both systems.

*This work is supported by the National Science and Technology Council, Taiwan (109-2112-M-006-026-MY3, 110-2124-M-006-009, 112-2124-M-006- 011, 113-2112-M-006-027) and the Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at NCKU. WTC acknowledges the National Science and Technology Council, Taiwan, for funding 111-2112-M-002-044-MY3, 113-2124- M-002-006, the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education of Taiwan 113L9008, and Academia Sinica project number AS-iMATE-113-12.

Publication: [1] J.-X. Hsu, R.-Z. Lin, E.-P. Liu, W.-T. Chen, C.-L. Huang, Physica B: Condensed Matter, Volume 695, 2024, 416524, ISSN 0921-4526, https://doi.org/10.1016/j.physb.2024.416524

Presenters

  • Hsu Jia-Xiang

    • National Cheng Kung University

Authors

  • Hsu Jia-Xiang

    • National Cheng Kung University