Research/Sitter/MAGNDATA / 0.1084_Sr2Fe2O5.mcif

Sr₂Fe₂O₅

MAGNDATA entry 0.1084 · source

s-wave compensated ferrimagnet

Opposite moments cancel, but the two sublattices aren't related by any symmetry, so the bands split like a ferromagnet's (s-wave).

Spin group ¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 691.8 K (419 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I m′ a′ 2 BNS 46.245
Point group	m′m′2
Parent space group	I m a 2 No. 46
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.6685 · b 15.5823 · c 5.5265 Å · α 90° · β 90° · γ 90°
Transition	691.8 K (419 °C)
Measured at	293 K
Magnetic ions	Fe
Largest moment component	3.92 μ_B
Method	NPD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in I m′ a′ 2 →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1	Sr	0.0163	0.1089	0.4989
Fe1	Fe	0	0	0	0	0	3.92	3.92
Fe2	Fe	0.0645	0.75	0.9833	0	0	−3.92	3.92
O1	O	0.2574	0.9912	0.2537
O2	O	0.05	0.1411	0.001
O3	O	0.1432	0.75	0.6224

Moment components are along the crystal axes a, b, c (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

M. Schmidt et al. Journal of Solid State Chemistry (2001) · doi:10.1006/jssc.2000.8998

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1084_Sr2Fe2O5.mcif from MAGNDATA · entry page

sha256 of this copy: 03a4e43f952612188ef67858f9c4e5a6eec8c76238fc18440d7fdaf7ffc3fe3b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1084_Sr2Fe2O5.mcif.