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Title: Ferromagnetic quantum critical point in CePd 2 P 2 with Pd Ni substitution

Abstract

Here, an investigation of the structural, thermodynamic, and electronic transport properties of the isoelectronic chemical substitution series Ce(Pd 1–xNi x) 2P 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–Kittel–Kasuya–Yosida (RKKY) interactions, and the introduction of disorder through alloying. Near the critical region at x cr ≈ 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 CePd 2P 2 has a purely trivalent cerium f state, CeNi 2P 2 has a small (<10 %) tetravalent contribution. In a broad region around x cr, there is a breakdown of Fermi-liquid temperature dependences, signaling the influence of quantum critical fluctuations and disorder effects. Measurements of clean CePd 2P 2 furthermore show that applied pressure has an initial effect similar to alloying on the ferromagnetic order. From these results, CePd 2P 2 emerges as a keystone system to test theories such as the Belitz-Kirkpatrick-Vojtamore » model for ferromagnetic quantum criticality, where distinct behaviors are expected in the dirty and clean limits.« less

Authors:
 [1];  [2];  [3];  [2];  [4];  [2];  [5];  [2];  [6];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Florida State Univ., Tallahassee, FL (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Stanford Univ., Stanford, CA (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Washington, Seattle, WA (United States)
  6. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1458410
Grant/Contract Number:
DMR-1157490; DMR-1644779; SC0016251; SC0016568; AC02-76SF00515; AC02-05CH11231; P41GM103393
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 22; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Lai, Y., Bone, S. E., Minasian, S., Ferrier, M. G., Lezama-Pacheco, J., Mocko, V., Ditter, A. S., Kozimor, S. A., Seidler, G. T., Nelson, W. L., Chiu, Y. -C., Huang, K., Potter, W., Graf, D., Albrecht-Schmitt, T. E., and Baumbach, R. E.. Ferromagnetic quantum critical point in CePd2P2 with Pd → Ni substitution. United States: N. p., 2018. Web. doi:10.1103/physrevb.97.224406.
Lai, Y., Bone, S. E., Minasian, S., Ferrier, M. G., Lezama-Pacheco, J., Mocko, V., Ditter, A. S., Kozimor, S. A., Seidler, G. T., Nelson, W. L., Chiu, Y. -C., Huang, K., Potter, W., Graf, D., Albrecht-Schmitt, T. E., & Baumbach, R. E.. Ferromagnetic quantum critical point in CePd2P2 with Pd → Ni substitution. United States. doi:10.1103/physrevb.97.224406.
Lai, Y., Bone, S. E., Minasian, S., Ferrier, M. G., Lezama-Pacheco, J., Mocko, V., Ditter, A. S., Kozimor, S. A., Seidler, G. T., Nelson, W. L., Chiu, Y. -C., Huang, K., Potter, W., Graf, D., Albrecht-Schmitt, T. E., and Baumbach, R. E.. Wed . "Ferromagnetic quantum critical point in CePd2P2 with Pd → Ni substitution". United States. doi:10.1103/physrevb.97.224406.
@article{osti_1458410,
title = {Ferromagnetic quantum critical point in CePd2P2 with Pd → Ni substitution},
author = {Lai, Y. and Bone, S. E. and Minasian, S. and Ferrier, M. G. and Lezama-Pacheco, J. and Mocko, V. and Ditter, A. S. and Kozimor, S. A. and Seidler, G. T. and Nelson, W. L. and Chiu, Y. -C. and Huang, K. and Potter, W. and Graf, D. and Albrecht-Schmitt, T. E. and Baumbach, R. E.},
abstractNote = {Here, an investigation of the structural, thermodynamic, and electronic transport properties of the isoelectronic chemical substitution series Ce(Pd1–xNix)2P2 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–Kittel–Kasuya–Yosida (RKKY) interactions, and the introduction of disorder through alloying. Near the critical region at xcr ≈ 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 show that 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.},
doi = {10.1103/physrevb.97.224406},
journal = {Physical Review B},
number = 22,
volume = 97,
place = {United States},
year = {Wed Jun 06 00:00:00 EDT 2018},
month = {Wed Jun 06 00:00:00 EDT 2018}
}

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