Ferromagnetism in Pr-rich binary Pr7Ru3 intermetallic compound

Królak, S.; Świątek, H.; Górnicka, K.; Winiarski, M. J.; Xie, W.; Cava, R. J.; Klimczuk, T.

doi:10.1016/j.jallcom.2022.167279

Ferromagnetism in Pr-rich binary Pr₇Ru₃ intermetallic compound

Journal Article · Wed Sep 21 00:00:00 EDT 2022 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2022.167279· OSTI ID:2419515

Królak, S. ^[1]; Świątek, H. ^[2]; Górnicka, K. ^[2]; Winiarski, M. J. ^[2]; Xie, W. ^[3]; Cava, R. J. ^[4]; Klimczuk, T. ^[2]

Gdansk University of Technology (Poland); OSTI
Gdansk University of Technology (Poland)
Rutgers Univ., Piscataway, NJ (United States)
Princeton Univ., NJ (United States)

We present the synthesis and experimental characterization of the binary intermetallic compound Pr₇Ru₃. The polycrystalline sample was prepared by arc melting pure Pr and Ru, followed by homogenization at 500 °C and 600 °C for 48 and 89 h, respectively. Powder x-ray diffraction confirms that Pr₇Ru₃ crystallizes in an orthorhombic crystal structure (Pnma, space group no. 62) with the lattice parameters: a = 7.3606(7) Å, b = 23.120(1) Å and c = 6.5959(5) Å. Magnetization, resistivity, and heat capacity measurements reveal a ferromagnetic transition in Pr₇Ru₃ with the Curie temperature T_C ~ 24.5 K. The bulk transition is confirmed by a large λ-shape anomaly observed in the specific heat measurement. The magnetic susceptibility above the transition obeys the modified Curie-Weiss law with a positive Curie-Weiss temperature $$\ominus$$_CW = 30(1) K and an effective magnetic moment of 3.39(1) μ_B/Pr. Resistivity data for Pr₇Ru₃ reveals metallic-like behavior with a clear anomaly at the transition temperature which is smeared by an applied magnetic field. We also synthesized high-quality nonmagnetic analog La₇Ru₃ for which superconducting transition is observed with T_c = 1.95 K, in agreement with the literature.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Univ., NJ (United States); Rutgers Univ., Piscataway, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-98ER45706; SC0022156

OSTI ID:: 2419515

Journal Information:: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 929; ISSN 0925-8388

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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