Evolution of itinerant antiferromagnetism of La₂Ni₇ under pressure

Quantum critical point (QCP) has been widely studied in itinerant antiferromagnet systems by suppressing second order phase transition, upon application of pressure, doping or magnetic field [1]. Recently, La₂Ni₇ was studied in single crystalline form, proven to be a small moment antiferromagnet of three antiferromagnetic (AFM) transitions, with multiple magnetic regions from H-T phase diagram [2]. It has been reported that Cu doping suppressed the AFM order and a single-ion Kondo like behavior emergers in the vicinity of QCP [3]. Previous work on La₂Ni₇ under pressure has been done up to 2 GPa [2], showed minimal effects of pressure. Here we report high pressure transport measurements on La₂Ni₇ in a diamond anvil cell, along with the anisotropic transport behavior within ab-plane and along c-direction. The pressure dependence of three AFM transition temperatures shows distinct behavior, while magnetoresistance measurements suggest the suppression of the ground AFM state.



[1] Canfield, P. C. & Bud’ko, S. L. Rep Prog Phys 79, 084506 (2016).

[2] Ribeiro, R. A. et al, Phys. Rev. B 105, 014412 (2022).

[3] Das, A. et al. Preprint at https://doi.org/10.48550/arXiv.2503.11872 (2025).