Structural Investigation into Magnetic Spin Orders of a Manganese Phosphatic Oxyhydroxide, Mn-5[(PO4)(2)(PO3(OH))(2)](HOH)(4)

Park, Sohyun; Hartl, Anna; Sheptyakov, Denis; Hoelzel, Markus und Arauzo, Ana (2021): Structural Investigation into Magnetic Spin Orders of a Manganese Phosphatic Oxyhydroxide, Mn-5[(PO4)(2)(PO3(OH))(2)](HOH)(4). In: Symmetry-Basel, Bd. 13, Nr. 9, 1688

Abstract

The ferri- and antiferromagnetic structures of a hureaulite-type synthetic compound, Mn-5(2+)(PO4)(2)(PO3(OH))(2)(HOH)(4), were elucidated by high-resolution neutron powder diffraction in combination with magnetic susceptibility and heat capacity measurements. At 6.17 K, the paramagnetic phase (space group: C2/c) transforms to inherit a ferrimagnetic order (magnetic space group: C2 '/c '), followed at 1.86 K by an incommensurately modulated antiferromagnetic order (magnetic superspace group: P2(1)/c.1 '(alpha 0 gamma)00s with the propagation vector k(0.523(2), 0, 0.055(1)). In the ferrimagnetic state, antiferromagnetic interactions are dominant for both intra and inter pentamers of Mn2+(O, HOH)(6) octahedra. Differently aligned spin-canting sublattices seen in the ferrimagnetic models at 3.4, 4.5, and 6.1 K explain a weak ferromagnetism in the title compound. The observation of magnetic moments vigorously changing in a small temperature range of 6.1-1.5 K adumbrates a high complexity of interplaying structural and magnetic orders in this manganese phosphatic oxyhydroxide.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• Sprache: Englisch