Research/Sitter/MAGNDATA / 0.567_HoNi0.64Ge2.mcif

HoNi_0.64Ge₂

MAGNDATA entry 0.567 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 11 K (−262 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C m′ c m BNS 63.459
Parent space group	C m c m No. 63
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.094 · b 16.283 · c 4.024 Å · α 90° · β 90° · γ 90°
Transition	11 K (−262 °C)
Measured at	4.2 K
Magnetic ions	Ho
Largest moment component	6.4 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 C m′ c m →

Atom sites · 4 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ge1	Ge	0.4508	0.25
Ge2	Ge	0.749	0.25
Ho1	Ho	0.1053	0.25	0	0	6.4	6.4
Ni1	Ni	0.3111	0.25

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

W. Bazelo et al. Journal of Magnetism and Magnetic Materials (1992) · doi:10.1016/0304-8853(92)91766-M

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.567_HoNi0.64Ge2.mcif from MAGNDATA · entry page

sha256 of this copy: c1692011b64a199c9a45aa1c48a0bbcd715c8f9992bb9655ab84afe78ea6455a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.567_HoNi0.64Ge2.mcif.