Research/Sitter/MAGNDATA / 0.509_BaFe12O19.mcif

BaFe₁₂O₁₉

MAGNDATA entry 0.509 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹6/¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 470 K (197 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 6₃/m m′ c′ BNS 194.270
Parent space group	P 6₃/m m c No. 194
Spins	collinear · net moment 41.8 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.865 · b 5.865 · c 23.099 Å · α 90° · β 90° · γ 120°
Transition	470 K (197 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	4.9 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 P 6₃/m m′ c′ →

Atom sites · 11 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0	0	0	0	0	4.1	4.1
Fe2	Fe	0	0	0.25	0	0	4.8	4.8
Fe3	Fe	0.3333	0.6667	0.028	0	0	−4.5	4.5
Fe4	Fe	0.3333	0.6667	0.1897	0	0	−4.2	4.2
Fe5	Fe	0.1666	0.3332	0.8917	0	0	4.9	4.9
Ba1	Ba	0.3333	0.6667	0.75
O1	O	0	0	0.1519
O2	O	0.3333	0.6667	0.9445
O3	O	0.188	0.376	0.25
O4	O	0.159	0.318	0.0523
O5	O	0.5	0	0.1493

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

A. Collomb et al. Journal of Magnetism and Magnetic Materials (1986) · doi:10.1016/0304-8853(86)90734-1

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.509_BaFe12O19.mcif from MAGNDATA · entry page

sha256 of this copy: 8c2536b5e675d985b1a00d0d531c47f0cb204ff9b21c091ce29c1b5a8e9d2dca
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.509_BaFe12O19.mcif.