Research/Sitter/MAGNDATA / 0.1012_FeMn2O4.mcif

FeMn₂O₄

MAGNDATA entry 0.1012 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹4/¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 400 K (127 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I m m′ a′ BNS 74.559
Point group	m′m′m
Parent space group	I 4₁/a m d No. 141
Spins	collinear · net moment 1.12 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.921 · b 5.921 · c 8.9 Å · α 90° · β 90° · γ 90°
Transition	400 K (127 °C)
Measured at	297 K
Magnetic ions	Fe, Mn
Largest moment component	3.08 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 m′ a′ →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0.75	0.125	3.08	0	0	3.08
Fe1	Fe	0	0.75	0.125	3.08	0	0	3.08
Fe2_1	Fe	0	0	0.5	−1.61	0	0	1.61
Fe2_2	Fe	0.25	0.75	0.75	−1.61	0	0	1.61
Mn2_1	Mn	0	0	0.5	−1.61	0	0	1.61
Mn2_2	Mn	0.25	0.75	0.75	−1.61	0	0	1.61
O1_1	O	0	0.474	0.261
O1_2	O	0.776	0.75	0.511

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

Q. Zhang et al. Chem. Mater. · doi:10.1021/acs.chemmater.2c03182

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1012_FeMn2O4.mcif from MAGNDATA · entry page

sha256 of this copy: a0b1875cace8b3edeef9d019b8e39f3867bd30c3ce6e9dce1b8eb205aaa436b7
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1012_FeMn2O4.mcif.