Research/Sitter/MAGNDATA / 1.840_Sr2Mn2O5.mcif

Sr₂Mn₂O₅

MAGNDATA entry 1.840 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 390 K (117 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_c b a m BNS 55.361
Point group	mmm1′
Parent space group	P b a m No. 55
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 5.51045 · b 10.75403 · c 7.61716 Å · α 90° · β 90° · γ 90°
Transition	390 K (117 °C)
Measured at	4.2 K
Magnetic ions	Mn
Largest moment component	3.44 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_c b a m →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr	Sr	0.2885	0.3639	0.25
Mn	Mn	0.2612	0.1204	0	0.53	3.44	0	3.4806
O1	O	0.2883	0.1037	0.25
O2	O	0.5307	0.2267	0
O3	O	0	0	0

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

V. Caignaert et al. J. Magn. Magn. Mater. (1997) · doi:10.1016/S0304-8853(96)00455-6

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.840_Sr2Mn2O5.mcif from MAGNDATA · entry page

sha256 of this copy: 8e08f79b6db3973a2c34b69e87a50954da2f49192e1804be178ff5b9c88e59b1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.840_Sr2Mn2O5.mcif.