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Title: Evidence for strong enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure [Anomalous enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure: Possible Kondo lattice behavior]

Abstract

Four-point electrical resistivity measurements were carried out on Nd metal and dilute magnetic alloys containing up to 1 at.% Nd in superconducting Y for temperatures 1.5–295 K under pressures to 210 GPa. The magnetic ordering temperature T o of Nd appears to rise steeply under pressure, increasing ninefold to 180 K at 70 GPa before falling rapidly. Y(Nd) alloys display both a resistivity minimum and superconducting pair breaking ΔT c as large as 38 K/at.% Nd. The present results give evidence that for pressures above 30–40 GPa, the exchange coupling J between Nd ions and conduction electrons becomes negative, thus activating Kondo physics in this highly correlated electron system. Furthermore, the rise and fall of T o and ΔT c with pressure can be accounted for in terms of an increase in the Kondo temperature.

Authors:
 [1];  [2];  [3];  [1]
  1. Washington Univ., St. Louis, MO (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Consortium for Materials Properties Research in Earth Sciences (COMPRES)
OSTI Identifier:
1374149
Alternate Identifier(s):
OSTI ID: 1358645
Grant/Contract Number:
AC02-06CH11357; FC52-08NA28554
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 20; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS

Citation Formats

Song, J., Bi, W., Haskel, D., and Schilling, J. S. Evidence for strong enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure [Anomalous enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure: Possible Kondo lattice behavior]. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.205138.
Song, J., Bi, W., Haskel, D., & Schilling, J. S. Evidence for strong enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure [Anomalous enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure: Possible Kondo lattice behavior]. United States. doi:10.1103/PhysRevB.95.205138.
Song, J., Bi, W., Haskel, D., and Schilling, J. S. Mon . "Evidence for strong enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure [Anomalous enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure: Possible Kondo lattice behavior]". United States. doi:10.1103/PhysRevB.95.205138. https://www.osti.gov/servlets/purl/1374149.
@article{osti_1374149,
title = {Evidence for strong enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure [Anomalous enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure: Possible Kondo lattice behavior]},
author = {Song, J. and Bi, W. and Haskel, D. and Schilling, J. S.},
abstractNote = {Four-point electrical resistivity measurements were carried out on Nd metal and dilute magnetic alloys containing up to 1 at.% Nd in superconducting Y for temperatures 1.5–295 K under pressures to 210 GPa. The magnetic ordering temperature To of Nd appears to rise steeply under pressure, increasing ninefold to 180 K at 70 GPa before falling rapidly. Y(Nd) alloys display both a resistivity minimum and superconducting pair breaking ΔTc as large as 38 K/at.% Nd. The present results give evidence that for pressures above 30–40 GPa, the exchange coupling J between Nd ions and conduction electrons becomes negative, thus activating Kondo physics in this highly correlated electron system. Furthermore, the rise and fall of To and ΔTc with pressure can be accounted for in terms of an increase in the Kondo temperature.},
doi = {10.1103/PhysRevB.95.205138},
journal = {Physical Review B},
number = 20,
volume = 95,
place = {United States},
year = {Mon May 15 00:00:00 EDT 2017},
month = {Mon May 15 00:00:00 EDT 2017}
}

Journal Article:
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