Research/Sitter/MAGNDATA / 0.213_Sr2Mn2CuAs2O2.mcif

Sr₂Mn₂CuAs₂O₂

MAGNDATA entry 0.213 · 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 ≤ 95 K (−178 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I 4/m m′ m′ BNS 139.537
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 3.38 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.0833 · b 4.0833 · c 18.5919 Å · α 90° · β 90° · γ 90°
Transition	95 K (−178 °C)
Measured at	4 K
Magnetic ions	Mn
Largest moment component	3.89 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 4/m m′ m′ →

Atom sites · 6 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1	Sr	0	0.4104
Mn1	Mn	0	0	0	0	3.89	3.89
Cu1	Cu	0.5	0.25
Mn2	Mn	0.5	0.25	0	0	−1.1	1.1
As1	As	0	0.1675
O1	O	0.5	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

R. Nath et al. Phys. Rev. B (2010) · doi:10.1103/PhysRevB.81.224513

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.213_Sr2Mn2CuAs2O2.mcif from MAGNDATA · entry page

sha256 of this copy: a74c03c05513e40f9d47a4682b3540c2c4f362b77f291bfd4df5d4c467ecec71
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.213_Sr2Mn2CuAs2O2.mcif.