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Abstrakt
The magnetic, transport, and thermodynamic properties of NdIr3 are reported. Its PuNi3-type crystal structure (space group R−3m), with lattice parameters a= 5.3262(1)Å and c=26.2218(3)Å, was confirmed by powder x-ray diffraction. Our measurements indicate that NdIr3 exhibits a previously unreported paramagnetic to ferromagnetic phase transition below TC=10.6 K(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=11.7Jmol−1K−1 is lower than expected for J=9/2 and instead close to the J=1/2 system. This suggests 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 reported.
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Autorzy (5)
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Weiwei Xie
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Elizabeth M. Carnicom
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Robert J. Cava
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Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- Licencja
- Copyright (2019 American Physical Society)
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
PHYSICAL REVIEW B
nr 99,
wydanie 10,
strony 1 - 8,
ISSN: 2469-9950 - Język:
- angielski
- Rok wydania:
- 2019
- Opis bibliograficzny:
- Górnicka K., Xie W., Carnicom E. M., Cava R. J., Klimczuk T.: Synthesis and physical properties of the 10.6 K ferromagnet NdIr3// PHYSICAL REVIEW B. -Vol. 99, iss. 10 (2019), s.1-8
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1103/physrevb.99.104430
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 151 razy