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Synthesis and physical properties of the 10.6 K ferromagnet NdIr3

Journal Article · · Physical Review B
 [1];  [2];  [3];  [3];  [4]
  1. Univ. of Gdansk (Poland); Princeton University
  2. Louisiana State Univ., Baton Rouge, LA (United States)
  3. Princeton Univ., NJ (United States)
  4. Univ. of Gdansk (Poland)

The magnetic, transport, and thermodynamic properties of $$PuNi_3$$ are reported here. Its $$PuN_3$$-type crystal structure (space group $R-3m$), with lattice parameters $ a = 5.3262(1) Å$ and $$c = 26.2218(3) Å_1$$ was confirmed by powder x-ray diffraction. Our measurements indicate that $$NdIr_3$$ reflects a previously unreported paramagnetic to ferromagnetic phase transition below $$T_C = 10.6K$$ (determined by using the Arrott plot). The magnetic susceptibility obeys the Curie-Weiss law with an effective magnetic moment of μeff=3.63(2) μB/Nd and a paramagnetic Curie temperature θP=5.4(6)K . The heat-capacity anomaly at TC confirms a bulk nature of the transition, though ΔCp=11.7 Jmo l-1K-1 is lower than expected for $J = 9/2$ and instead close to the $J = 1/2$ system. This indicates that Nd ions are subject to the crystalline electrical field that removes spin degeneracy and leaves the Nd ions in a doublet ground state. Resistivity and heat-capacity measurements reveal an anomaly at around 70 K. The origin of this anomaly is unknown, but the lack of thermal hysteresis suggests that it is a second-order phase transition and may be related to electronic instabilities. The calculated electronic structure is observed.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Ministry of Science and Higher Education
Grant/Contract Number:
FG02-98ER45706
OSTI ID:
1595065
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 10 Vol. 99; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Iridium 5 d -electron driven superconductivity in ThI r 3 journal December 2019

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