Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Field induced structural phase transition at temperatures above the Curie point in Gd5(SixGe1-x)4

Hadimani, R. L., Melikhov, Yevgen ORCID: https://orcid.org/0000-0002-9787-5238, Snyder, John Evan and Jiles, David 2009. Field induced structural phase transition at temperatures above the Curie point in Gd5(SixGe1-x)4. Journal of Applied Physics 105 (7) , 07A927 - 07A927. 10.1063/1.3076419

[thumbnail of Field_induced_structural_phase_transition_at_temperatures.pdf]
Preview
PDF
Download (382kB) | Preview

Abstract

Gd5(SixGe1−x)4 exhibits a field induced first order phase transition from a monoclinic paramagnetic to an orthorhombic ferromagnetic at temperatures above its Curie temperature for 0.41 ≤ x ≤ 0.51. The field required to induce the transition increases with temperature. This field induced first order phase transition was observed even above the projected second order phase transition temperature of the orthorhombic phase. This may be due to the fact that the applied magnetic field is so high that it causes the broadening to a wider range of higher temperatures of the second order phase transition of the orthorhombic phase, and at such high magnetic fields the magnetic moment is still quite large, therefore, causing the transition. This hypothesis seems to be confirmed by the various magnetic moment versus magnetic field, magnetic moment versus temperature, and strain versus magnetic field measurements carried out on single crystal Gd5Si1.95Ge2.05 and Gd5Si2Ge2 samples at magnetic fields of 0–9 T and at temperatures of 265–305 K.

Item Type: Article
Status: Published
Schools: Engineering
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Curie temperature; ferromagnetic materials; gadolinium alloys; germanium alloys; magnetic moments; magnetic transitions; silicon alloys
Publisher: American Institute of Physics
ISSN: 0021-8979
Last Modified: 07 Jul 2023 18:23
URI: https://orca.cardiff.ac.uk/id/eprint/7773

Citation Data

Cited 13 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics