Research/Sitter/MAGNDATA / 0.824_Sr2MnGaO5.5.mcif

Sr₂MnGaO_5.5

MAGNDATA entry 0.824 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 110 K (−163 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C 4/m b m BNS 127.397
Point group	4/mmm1′
Parent space group	P 4/m m m No. 123
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 5.375 · b 5.375 · c 7.9602 Å · α 90° · β 90° · γ 90°
Transition	110 K (−163 °C)
Measured at	1.6 K
Magnetic ions	Mn
Largest moment component	2.1 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 4/m b m →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	0	0	2.1	2.1
Sr1	Sr	0	0.5	0.2347
Ga1	Ga	0.973	0.973	0.5
O1	O	0.75	0.75	0
O2	O	0	0	0.2457
O3	O	0.205	0.705	0.5

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. Yu. Pomjakushin et al. PHYSICAL REVIEW B (2002) · doi:10.1103/PhysRevB.66.184412

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.824_Sr2MnGaO5.5.mcif from MAGNDATA · entry page

sha256 of this copy: e7784f3e9bef28a9a5369dae1b70964c7fe470b37ed441ae239c803a51a9accd
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.824_Sr2MnGaO5.5.mcif.