Research/Sitter/MAGNDATA / 1.1.147_Ho.mcif

Ho

MAGNDATA entry 1.1.147 · 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.

ordered ≤ 105 K (−168 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P6₃221′(0,0,γ)h00s
Point group	6221′
Parent space group	P 6₃/m m c No. 194
Repeats every	3.94 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.25356] 1k
Cell	a 3.3976 · b 3.3976 · c 5.3898 Å · α 90° · β 90° · γ 120°
Transition	105 K (−168 °C)
Measured at	5 K
Magnetic ions	Ho
Largest moment component	8.012 μ_B
Method	NPD at P = 8 GPa

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 P6₃221′(0,0,γ)h00s →

Atom sites · 1 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0.3333	0.6667	0.25

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

M. Pardo-Sainz et al. Scientific Reports (2023) · doi:10.1038/s41598-023-39284-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.147_Ho.mcif from MAGNDATA · entry page

sha256 of this copy: 3cfe091b79e35fe0fe263afb86361e9d9f33eefa052f8fe3dcd15af0d8ebb0a3
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.147_Ho.mcif.