English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Anomalous triple point effects in the spin-density-wave Cr1-xAlx alloy system

Sheppard, C. J., Prinsloo, A. R. E., Alberts, H. L., Muchono, B., & Strydom, A. M. (2014). Anomalous triple point effects in the spin-density-wave Cr1-xAlx alloy system. Journal of Alloys and Compounds, 595, 164-177. doi:10.1016/j.jallcom.2014.01.129.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-A674-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C4DF-C
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Sheppard, C. J.1, Author
Prinsloo, A. R. E.1, Author
Alberts, H. L.1, Author
Muchono, B.1, Author
Strydom, A. M.2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

Content

show
hide
Free keywords: -
 Abstract: It was recently suggested that for the Cr1-xAlx alloy system the Sommerfeld specific heat coefficient (gamma) as a function of x may peak at the triple point (TP) concentration (x(t)) of the x-T magnetic phase diagram. The TP at (x(t), T-t) represents the intersection point of three magnetic phase transition lines at which incommensurate (I) and commensurate (C) spin-density-wave (SDW) phases are expected to coexist with the paramagnetic (P) phase. A comprehensive experimental study on the physical properties of single crystalline Cr1-xAlx alloys in the concentration range 0 <= x <= 0.034, that encloses x(t), is reported here for further investigations of the above conjecture and possible anomalous behaviour in other physical properties near x(t). The measurements include the electrical resistivity (rho), Seebeck coefficient (S), specific heat (C-p), Hall coefficient (R-H), magnetic susceptibility (chi) and thermal conductivity (kappa). All these properties, except for kappa, depict anomalous temperature and concentration dependencies of SDW origin for x close to x(t). The present study indicates a value of x(t) rather close to x = 0.022. The x-dependence of gamma exhibits an extraordinary large and sharp peak near this concentration. This observation is interpreted as indication that the temperature of the TP is likely situated at 0 K. A new magnetic phase diagram is therefore proposed for the Cr1-xAlx alloy system for x in the region of x(t). This study presents novel experimental evidence of exceptional anomalous magnetic behaviour around the TP concentration of the Cr1-xAlx system. It should incite similar studies on other Cr alloy systems with a TP on their magnetic phase diagrams. (C) 2014 Elsevier B. V. All rights reserved.

Details

show
hide
Language(s):
 Dates: 2014-05-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Alloys and Compounds
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Lausanne, Switzerland : Elsevier
Pages: - Volume / Issue: 595 Sequence Number: - Start / End Page: 164 - 177 Identifier: ISSN: 0925-8388
CoNE: /journals/resource/954925567746