Research/Sitter/MAGNDATA / 0.419_Er2Ge2O7.mcif

Er₂Ge₂O₇

MAGNDATA entry 0.419 · source

noncoplanar magnet

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

ordered ≤ 1.2 K (−272 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 4₁′ 2₁ 2′ BNS 92.113
Parent space group	P 4₁ 2₁ 2 No. 92
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 6.7826 · b 6.7826 · c 12.3317 Å · α 90° · β 90° · γ 90°
Transition	1.15 K (−272 °C)
Measured at	0.5 K
Magnetic ions	Er
Largest moment component	6.98 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 4₁′ 2₁ 2′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0.8743	0.3545	0.136	2.66	3.03	−6.98	8.0608
Ge1	Ge	0.9008	0.1508	0.6181
O1	O	0.8028	0.1972	0.75
O3	O	0.0663	0.337	0.5719
O4	O	0.6839	0.1458	0.5456

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

K. M. Taddei et al. PHYSICAL REVIEW MATERIALS (2019) · doi:10.1103/PhysRevMaterials.3.014405

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.419_Er2Ge2O7.mcif from MAGNDATA · entry page

sha256 of this copy: 2992a2b3db12dbe95e4e368f49e0407a88ae6a19e0406c0d1102e8e46aaf5761
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.419_Er2Ge2O7.mcif.