Stability of the 4f-magnetism in Ce.sub.2./sub.Pd.sub.2./sub.In under hydrostatic and uniaxial pressure

0548928 - FZÚ 2022 RIV CH eng J - Journal Article
Král, P. - Kaštil, Jiří - Klicpera, M. - Doležal, P. - Prokleška, J. - Havela, L. - Prchal, J.
Stability of the 4f-magnetism in Ce₂Pd₂In under hydrostatic and uniaxial pressure.
Journal of Alloys and Compounds. Roč. 878, Oct. (2021), č. článku 160304. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA MŠMT(CZ) LM2018096; GA ČR(CZ) GA21-09766S
Institutional support: RVO:68378271
Keywords : Ce₂Pd₂In * Shastry-Sutherland * anisotropy * magnetism * hydrostatic pressure * uniaxial pressure
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.371, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.jallcom.2021.160304

Among a large group of R2T2X intermetallics (R = rare earth, T = transition element, X = p-metal) crystallizing in the Shastry-Sutherland-like tetragonal structure, Ce2Pd2In represents a rare example of Ce-based ferromagnet, reached, however via an antiferromagnetic phase stable at higher temperatures. Here we describe the development of magnetism in Ce2Pd2In under external hydrostatic and uniaxial pressure, monitored by means of electrical resistivity, magnetization, and AC magnetic susceptibility experiments on a high-quality single crystal. The experiments prove a stability of the 4f magnetism in pressures up to 3 GPa. At these pressures only slightly reduced spontaneous magnetization in the FM state and enhanced electrical resistivity with signs of Kondo lattice behavior are observed. The AFM Néel temperature (TN = 4.65 K) is essentially pressure independent, while the Curie temperature (TC = 4.16 K at ambient pressure) significantly decreases under hydrostatic pressure. The fact that the ferromagnetic phase can be re-entered in weak magnetic fields (0.05 T) proves that the two types of magnetic order are effectively degenerate. Interestingly, TC is not affected by uniaxial pressure applied along the tetragonal c-axis, TN value exhibits only a weak decrease of 0.25 K GPa−1 under such uniaxial pressure. The crystal structure of Ce2Pd2In exhibits a strongly anisotropic thermal expansion with anomalous expansion of the c-parameter with decreasing T. Modest size of magnetostriction effects, observed by dilatometry at ambient pressure, indicates only regular magnetovolume interactions.
Permanent Link: http://hdl.handle.net/11104/0324987