Strain development during the phase transition of La(Fe,Mn,Si)13Hz | Zendy

Henrique Neves Bez | Zendy; K. Nielsen | Zendy; Anders Smith | Zendy; Poul Norby | Zendy; Kenny Ståhl | Zendy; C.R.H. Bahl | Zendy

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Strain development during the phase transition of La(Fe,Mn,Si)13Hz

Author(s) -

Henrique Neves Bez,

K. Nielsen,

Anders Smith,

Poul Norby,

Kenny Ståhl,

C.R.H. Bahl

Publication year - 2016

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4960358

Subject(s) - curie temperature , materials science , ferromagnetism , paramagnetism , crystallite , phase transition , atmospheric temperature range , condensed matter physics , phase (matter) , microstructure , transition temperature , analytical chemistry (journal) , crystallography , chemistry , metallurgy , thermodynamics , physics , superconductivity , organic chemistry , chromatography

We use powder X-ray diffraction to evaluate the temperature dependence of the crystalline properties during the magnetic phase transition of La(Fe,Mn,Si)13Hz as a function of the Fe/Mn/Si ratio. Both the paramagnetic and ferromagnetic phases were observed as peak overlaps in the patterns around the Curie temperature (TC) occurring continuously in a temperature range of about 5 K around TC. Using the Williamson-Hall method, we evaluate the strain developing in the crystallites during the transition and find that it is associated with the growth of the paramagnetic phase as the transition occurs. Based on our measurements and microstructure analyses, we propose that cracking during the phase transition is due to or aggravated by the small content of a La-rich phase.

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