Research/Sitter/MAGNDATA / 0.902_DyMn2Ge2.mcif

DyMn₂Ge₂

MAGNDATA entry 0.902 · 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 ≤ 33 K (−240 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I 4/m m′ m′ BNS 139.537
Point group	4/mm′m′
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 11.2 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 3.989 · b 3.989 · c 10.863 Å · α 90° · β 90° · γ 90°
Transition	33 K (−240 °C)
Measured at	8 K
Magnetic ions	Dy, Mn
Largest moment component	10.2 μ_B
Method	NSD

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 · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Dy1	Dy	0	0	0	0	10.2	10.2
Mn1	Mn	0.5	0.25	0	0	−2.3	2.3
Ge1	Ge	0	0.3848

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

H. Kobayashi et al. PHYSICAL REVIEW B (1991) · doi:10.1103/PhysRevB.43.728

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.902_DyMn2Ge2.mcif from MAGNDATA · entry page

sha256 of this copy: d9e2f8176c811a0b9609027936317b26d1cc5d164cb15ec5e12d6c64d09292c0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.902_DyMn2Ge2.mcif.