Research/Sitter/MAGNDATA / 1.374_HoNiGe.mcif

HoNiGe

MAGNDATA entry 1.374 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 5 K (−268 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_c c BNS 7.28
Parent space group	P n m a No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 13.704 · b 4.202 · c 14.526 Å · α 90° · β 90° · γ 90°
Transition	5 K (−268 °C)
Measured at	1.65 K
Magnetic ions	Ho
Largest moment component	9.98 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_c c →

Atom sites · 12 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1_1	Ho	0	0.25	0.3535	9.98	0	0	9.98
Ho1_2	Ho	0.25	0.75	0.1036	−9.98	0	0	9.98
Ho1_3	Ho	0	0.75	0.1464	9.98	0	0	9.98
Ho1_4	Ho	0.25	0.25	0.3965	−9.98	0	0	9.98
Ni1_1	Ni	0.0973	0.25	0.0423
Ni1_2	Ni	0.1527	0.75	0.2923
Ni1_3	Ni	0.9028	0.75	0.9577
Ni1_4	Ni	0.3473	0.25	0.2077
Ge1_1	Ge	0.1022	0.25	0.2077
Ge1_2	Ge	0.1478	0.75	0.4577
Ge1_3	Ge	0.8978	0.75	0.7923
Ge1_4	Ge	0.3522	0.25	0.0423

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

G. Andre et al. Journal of Magnetism and Magnetic Materials (1993) · doi:10.1016/0304-8853(93)90200-L

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.374_HoNiGe.mcif from MAGNDATA · entry page

sha256 of this copy: 027b90a7002e0b0c4c2efd17a71b8a8102160d889b18e33a139e1e4b890d5422
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.374_HoNiGe.mcif.