The crystal and magnetic structure of the magnetocaloric compound FeMnP{sub 0.5}Si{sub 0.5}

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.06.019· OSTI ID:21580257

Hoeglin, Viktor ^[1]; Hudl, Matthias ^[2]; Sahlberg, Martin ^[1]; Nordblad, Per ^[2]; Beran, Premysl ^[3]; Andersson, Yvonne ^[1]

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1. Department of Materials Chemistry, Uppsala University, Box 538, 75121 Uppsala (Sweden)
2. Department of Engineering Sciences, Uppsala University, Box 534, 75121 Uppsala (Sweden)
3. Nuclear Physics Institute, Academy of Sciences of the Czech Republic, 25068 Rez (Czech Republic)

The crystal and magnetic structure of the magnetocaloric compound FeMnP{sub 0.5}Si{sub 0.5} has been studied by means of neutron and X-ray powder diffraction. Single phase samples of nominal composition FeMnP{sub 0.5}Si{sub 0.5} have been prepared by the drop synthesis method. The compound crystallizes in the Fe{sub 2}P-type structure (P6-bar 2m) with the magnetic moments aligned along the a-axis. It is found that the Fe atoms are mainly situated in the tetrahedral 3g site while the Mn atoms prefer the pyramidal 3f position. The material is ferromagnetic (T{sub C}=382 K) and at 296 K the total magnetic moment is 4.4{mu}{sub B}/f.u. It is shown that the magnetic moment in the 3f site is larger (2.5{mu}{sub B}) than in the 3g site (1.9{mu}{sub B}). - Graphical abstract: The magnetic structure of FeMnP{sub 0.5}Si{sub 0.5} at 296 K. Revealed from refinements of neutron powder diffraction data. Highlights: > Single phase samples of the compound FeMnP{sub 0.5}Si{sub 0.5} has been synthesized by the drop synthesis method. > The crystal and magnetic structure was revealed from neutron powder diffraction data. > The material was found to crystallize in the Fe{sub 2}P-structure (P6-bar 2m). > The magnetic moments are coordinated along the a-axis with a total moment of 4.4{mu}{sub B}. > The large magnetic moments make FeMnP{sub 0.5}Si{sub 0.5} useful in magnetocaloric applications.

• OSTI ID: 21580257
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 9; Other Information: DOI: 10.1016/j.jssc.2011.06.019; PII: S0022-4596(11)00345-8; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CRYSTALS
IRON PHOSPHIDES
MAGNETIC MOMENTS
NEUTRON DIFFRACTION
NEUTRONS
SYNTHESIS
X-RAY DIFFRACTION
BARYONS
COHERENT SCATTERING
DIFFRACTION
ELEMENTARY PARTICLES
FERMIONS
HADRONS
IRON COMPOUNDS
NUCLEONS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
SCATTERING
TRANSITION ELEMENT COMPOUNDS