Research/Sitter/MAGNDATA / 0.240_Er2Cu2O5.mcif

Er₂Cu₂O₅

MAGNDATA entry 0.240 · source

noncoplanar magnet

Spins pointing in three dimensions, not confined to a plane.

ordered ≤ 28 K (−245 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n a 2₁ BNS 33.144
Parent space group	P n a 2₁ No. 33
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.7839 · b 3.4745 · c 12.4434 Å · α 90° · β 90° · γ 90°
Transition	28 K (−245 °C)
Measured at	1.5 K
Magnetic ions	Cu, Er
Largest moment component	5.5 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 n a 2₁ →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0.207	0.226	0	0.7	−5.5	2.9	6.257
Er2	Er	0.0414	0.222	0.33	0.7	−5.5	−2.9	6.257
Cu1	Cu	0.9911	0.653	0.112	0	1.2	0	1.2
Cu2	Cu	0.2593	0.669	0.215	0	1.2	0	1.2
O1	O	0.176	0.727	0.357
O2	O	0.322	0.713	0.059
O3	O	0.124	0.319	0.167
O4	O	0.427	0.773	0.259
O5	O	0.424	0.227	0.476

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

J.L. Garcia-Muoz et al. Phys. Rev. B (1991) · doi:10.1103/PhysRevB.44.4716

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.240_Er2Cu2O5.mcif from MAGNDATA · entry page

sha256 of this copy: ad5b09e3d4661c3d724d5dff96ae7a971def3a0fcc6c5e86f2e2ebb2297239aa
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.240_Er2Cu2O5.mcif.