Structural and magnetic phase transitions in Cs-2[FeCl5(H2O)] - Kölner UniversitätsPublikationsServer

Froehlich, Tobias, Stein, Jonas, Bohaty, Ladislav, Becker, Petra, Gukasov, Arsen and Braden, Markus ORCID: 0000-0002-9284-6585 (2018). Structural and magnetic phase transitions in Cs-2[FeCl5(H2O)]. J. Phys.-Condes. Matter, 30 (29). BRISTOL: IOP PUBLISHING LTD. ISSN 1361-648X

Full text not available from this repository.

DOI:10.1088/1361-648X/aaca6c

Abstract

The compound Cs-2[FeCl5(H2O)] is magnetoelectric but not multiferroic with an erythrosiderite-related structure. We present a comprehensive investigation of its structural and antiferromagnetic phase transitions by polarization microscopy, pyroelectric measurements, x-ray diffraction and neutron diffraction. At about (157.6 +/- 0.1) K, the compound changes its symmetry from Cmcm to I2/c, with a doubling of the original c-axis. This transformation is associated with rotations of the [FeCl5O] octahedra and corresponds to an ordering of the H2O molecules and of the related H bonds. A significant ferroelectric polarization can be excluded for this transition by precise pyrocurrent measurements. The antiferromagnetic phase transition occurring at 6.4K results in the magnetic space group I2'/c, which perfectly agrees with previous measurements of the linear magnetoelectric effect and magnetization.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Froehlich, Tobias	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Stein, Jonas	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Bohaty, Ladislav	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Becker, Petra	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Gukasov, Arsen	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Braden, Markus	UNSPECIFIED	orcid.org/0000-0002-9284-6585	UNSPECIFIED