Research/Sitter/MAGNDATA / 1.1.10_DyMn6Ge6.mcif

DyMn₆Ge₆

MAGNDATA entry 1.1.10 · source

incommensurate spiral

Incommensurate: the magnetic pattern repeats every so many cells, but not a whole number of them, so it never lines up with the crystal lattice. Here it's a spiral: the spin direction rotates as you move along.

Structure · 9 properties

Magnetic group	P62′2′(00γ)h00
Point group	62′2′
Parent space group	P 6/m m m No. 191
Repeats every	6.06 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.1651] 1k
Cell	a 5.2081 · b 5.2081 · c 8.1522 Å · α 90° · β 90° · γ 120°
Magnetic ions	Dy, Mn
Largest moment component	7.154 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 P62′2′(00γ)h00 →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Dy1	Dy	0	0	0	0	0	3.932	3.932
Mn1	Mn	0.5	0	0.251	0	0	−1.149	1.149
Ge1	Ge	0.3333	0.6667	0
Ge2	Ge	0.3333	0.6667	0.5
Ge3	Ge	0	0	0.3447

Incommensurate: the moments are modulated; the picture evaluates each atom's Fourier series at its own phase.

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. Rodriguez-Carvajal et al. EPJ Web of Conferences (2012) · doi:10.1051/epjconf/20122200010

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.10_DyMn6Ge6.mcif from MAGNDATA · entry page

sha256 of this copy: c4077673d8daa3e60bf37f20504dbb85fcf83b9fda29d697bf2564dde3ca100f
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.10_DyMn6Ge6.mcif.