Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
8-1-2010
Journal or Book Title
Physical Review B
Volume
82
Issue
5
First Page
054424
DOI
10.1103/PhysRevB.82.054424
Abstract
We have studied the thermal, magnetic, and electrical properties of the ternary intermetallic system CeNiGe3 by means of specific heat, magnetization, and resistivity measurements. The specific heat data, together with the anisotropic magnetic susceptibility, was analyzed on the basis of the point charge model of crystalline electric field. The J=5/2 multiplet of the Ce3+ is split by the crystalline electric field into three Kramers doublets, where the second and third doublets are separated from the first (ground state) doublet by Δ1∼100 K and Δ2∼170 K, respectively. In zero field CeNiGe3 exhibits an antiferromangeic order below TN=5.0 K. For H∥a two metamagnetic transitions are clearly evidenced between 2–4 K from the magnetization isotherm and extended down to 0.4 K from the magnetoresistance measurements. For H∥a, TN shifts to lower temperature as magnetic field increases, and ultimately disappears at Hc∼32.5 kOe. For H>Hc, the electrical resistivity shows the quadratic temperature dependence (Δρ=AT2). For H⪢Hc, an unconventional Tn dependence of Δρ with n>2 emerges, the exponent n becomes larger as magnetic field increases. Although the antiferromagnetic phase transition temperature in CeNiGe3 can be continuously suppressed to zero, it provides an example of field tuning that does not match current simple models of quantum criticality.
Copyright Owner
American Physical Society
Copyright Date
2010
Language
en
File Format
application/pdf
Recommended Citation
Mun, E. D.; Bud’ko, Sergey L.; Kreyssig, Andreas; and Canfield, Paul C., "Tuning low-temperature physical properties of CeNiGe3 by magnetic field" (2010). Physics and Astronomy Publications. 697.
https://lib.dr.iastate.edu/physastro_pubs/697
Comments
This article is published as Mun, E. D., S. L. Bud’ko, A. Kreyssig, and P. C. Canfield. "Tuning low-temperature physical properties of CeNiGe 3 by magnetic field." Physical Review B 82, no. 5 (2010): 054424. DOI: 10.1103/PhysRevB.82.054424. Posted with permission.