Research/Sitter/MAGNDATA / 0.237_Er2Sn2O7.mcif

Er₂Sn₂O₇

MAGNDATA entry 0.237 · 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 ≤ 0.1 K (−273 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I 4₁′/a m d′ BNS 141.555
Parent space group	F d 3 m No. 227
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.3504 · b 10.3504 · c 10.3504 Å · α 90° · β 90° · γ 90°
Transition	0.1 K (−273 °C)
Measured at	0.068 K
Magnetic ions	Er
Largest moment component	3.1 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 I 4₁′/a m d′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0.5	0.5	0.5	−3.1	3.1	0	4.3841
Sn1	Sn	0	0	0
O1_1	O	0.3375	0.125	0.125
O1_2	O	0.125	0.125	0.3375
O2	O	0.375	0.375	0.375

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

S. Petit et al. Phys. Rev. Lett. (2017) · doi:10.1103/PhysRevLett.119.187202

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.237_Er2Sn2O7.mcif from MAGNDATA · entry page

sha256 of this copy: 9526c7a5947288436e8e4082c44ffed955a09d7b6e443a1a69b5b051d35c73f0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.237_Er2Sn2O7.mcif.