Ferromagnetism in Pr-rich binary Pr7Ru3 intermetallic compound

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

doi:10.1016/j.jallcom.2022.167279

Ferromagnetism in Pr-rich binary Pr₇Ru₃ intermetallic compound

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

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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 ϴ_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.

Original language	English
Article number	167279
Journal	Journal of Alloys and Compounds
Volume	929
DOIs	https://doi.org/10.1016/j.jallcom.2022.167279
State	Published - Dec 25 2022
Externally published	Yes

Funding

The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Tomasz Klimczuk reports financial support was provided by National Science Centre Poland. Robert J. Cava reports financial support was provided by Division of Basic Energy Sciences of the US Department of Energy. Weiwei Xie reports financial support was provided by Division of Basic Energy Sciences of the US Department of Energy. The work at GUT was supported by the National Science Centre (Poland; Grant UMO-2018/30/M/ST5/00773 ), at Princeton University by the Division of Basic Energy Sciences of the US Department of Energy grant DE-FG02–98ER45706 . The work at Rutgers was supported by DOE under the contract of DE-SC0022156 . TK acknowledges Joe D. Thompson (LANL) for valuable discussion and comments to the manuscript.

Keywords

Ferromagnetism
Synthesis

Access to Document

10.1016/j.jallcom.2022.167279

Cite this

@article{2a351ece985c49edb6674066a315bb9f,

title = "Ferromagnetism in Pr-rich binary Pr7Ru3 intermetallic compound",

abstract = "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) {\AA}, b = 23.120(1) {\AA} and c = 6.5959(5) {\AA}. Magnetization, resistivity, and heat capacity measurements reveal a ferromagnetic transition in Pr7Ru3 with the Curie temperature TC ∼ 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 ϴCW = 30(1) K and an effective magnetic moment of 3.39(1) μB/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 Tc = 1.95 K, in agreement with the literature.",

keywords = "Ferromagnetism, Synthesis",

author = "S. Kr{\'o}lak and H. {\'S}wi{\c a}tek and K. G{\'o}rnicka and Winiarski, \{M. J.\} and W. Xie and Cava, \{R. J.\} and T. Klimczuk",

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doi = "10.1016/j.jallcom.2022.167279",

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T1 - Ferromagnetism in Pr-rich binary Pr7Ru3 intermetallic compound

AU - Królak, S.

AU - Świątek, H.

AU - Górnicka, K.

AU - Winiarski, M. J.

AU - Xie, W.

AU - Cava, R. J.

AU - Klimczuk, T.

PY - 2022/12/25

Y1 - 2022/12/25

N2 - 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 TC ∼ 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 ϴCW = 30(1) K and an effective magnetic moment of 3.39(1) μB/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 Tc = 1.95 K, in agreement with the literature.

AB - 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 TC ∼ 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 ϴCW = 30(1) K and an effective magnetic moment of 3.39(1) μB/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 Tc = 1.95 K, in agreement with the literature.

KW - Ferromagnetism

KW - Synthesis

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