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Ferromagnetic Quantum Critical Point In Cepd2p2 With Pd -> Ni Substitution

Title: Ferromagnetic Quantum Critical Point In Cepd2p2 With Pd -> Ni Substitution.
Name(s): Lai, Y., author
Bone, S. E., author
Minasian, S., author
Ferrier, M. G., author
Lezama-Pacheco, J., author
Mocko, V., author
Ditter, A. S., author
Kozimor, S. A., author
Seidler, G. T., author
Nelson, W. L., author
Chiu, Y.-C., author
Huang, K., author
Potter, W., author
Graf, D., author
Albrecht-Schmitt, T. E., author
Baumbach, R. E., author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2018-06-06
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: An investigation of the structural, thermodynamic, and electronic transport properties of the isoelectronic chemical substitution series Ce(Pd1-x Ni-x)(2)P-2 is reported, where a possible ferromagnetic quantum critical point is uncovered in the temperature-concentration (T-x) phase diagram. This behavior results from the simultaneous contraction of the unit cell volume, which tunes the relative strengths of the Kondo and Ruderman-KittelKasuya- Yosida (RKKY) interactions, and the introduction of disorder through alloying. Near the critical region at x(cr) approximate to 0.7, the rate of contraction of the unit cell volume strengthens, indicating that the cerium f valence crosses over from trivalent to a noninteger value. Consistent with this picture, x-ray absorption spectroscopy measurements reveal that while CePd2P2 has a purely trivalent cerium f state, CeNi2P2 has a small (<10 %) tetravalent contribution. In a broad region around xcr, there is a breakdown of Fermi-liquid temperature dependences, signaling the influence of quantum critical fluctuations and disorder effects. Measurements of clean CePd2P2 furthermore showthat applied pressure has an initial effect similar to alloying on the ferromagnetic order. From these results, CePd2P2 emerges as a keystone system to test theories such as the Belitz-Kirkpatrick-Vojta model for ferromagnetic quantum criticality, where distinct behaviors are expected in the dirty and clean limits.
Identifier: FSU_libsubv1_wos_000434256700002 (IID), 10.1103/PhysRevB.97.224406 (DOI)
Keywords: temperature, superconductivity, pressure, magnetic-properties, metals, phase-transitions, x-ray-absorption, core-level spectroscopy, electron ferromagnetism, valence state
Publication Note: The publisher’s version of record is available at
Persistent Link to This Record:
Host Institution: FSU
Is Part Of: Physical Review B.
Issue: iss. 22, vol. 97

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Lai, Y., Bone, S. E., Minasian, S., Ferrier, M. G., Lezama-Pacheco, J., Mocko, V., … Baumbach, R. E. (2018). Ferromagnetic Quantum Critical Point In Cepd2p2 With Pd -> Ni Substitution. Physical Review B. Retrieved from