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Abstract
We report a study on tuning the charge density wave (CDW) ferromagnet SmNiC2 to a weakly coupled superconductor by substituting La for Sm. X-ray diffraction measurements show that the doped compounds obey Vegard’s law, where La (Lu) alloying expands (shrinks) the lattice due to its larger (smaller) atomic size than Sm. In the series Sm1−xLaxNiC2, CDW transition (TCDW =148K) for SmNiC2 is gradually suppressed, while the ferromagnetic (FM) ordering temperature (TC) at 17K slightly increases up to x=0.3. For x>0.3, TC starts to decrease and there is no signature that could be related with the CDW phase. Electrical resistivity, magnetic susceptibility and specific heat measurements point toward the possible presence of a FM quantum critical point (QCP) near x=0.92, where the TC is extrapolated to zero temperature. Superconductivity in LaNiC2 (Tsc=2.9K) is completely suppressed with small amount of Sm inclusion near the proposed FM critical point, indicating a competition between the two ordered phases. The tunable lattice parameters via chemical substitution (La,Lu) and the ensuing change among the ordered phases of ferromagnetism, CDW and superconductivity underscores that SmNiC2 provides a rich avenue to study the rare example of a FM QCP, where the broken symmetries are intricately correlated
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Authors (6)
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G. Prathiba
- Department of Physics, Sungkyunkwan University -
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I. Kim
- Department of Physics, Sungkyunkwan University -
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S. Shin
- Department of Physics, Sungkyunkwan University -
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T. Park
- Department of Physics, Sungkyunkwan University -
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Full text
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1038/srep26530
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
Scientific Reports
no. 6,
ISSN: 2045-2322 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Prathiba G., Kim I., Shin S., Strychalska-Nowak J., Klimczuk T., Park T.: Tuning the ferromagnetic phase in the CDW compound SmNiC2 via chemical alloying// Scientific Reports. -Vol. 6, iss. 1 (2016), s.26530-
- DOI:
- Digital Object Identifier (open in new tab) 10.1038/srep26530
- Verified by:
- Gdańsk University of Technology
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