Research/Sitter/MAGNDATA / 1.369_HFe2Ge2.mcif

HFe₂Ge₂

MAGNDATA entry 1.369 · 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 ≤ 17 K (−256 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_A m c a BNS 64.480
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 7.8994 · b 7.8994 · c 10.3665 Å · α 90° · β 90° · γ 90°
Transition	17 K (−256 °C)
Measured at	1.5 K
Magnetic ions	Ho
Largest moment component	6.6 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_A m c a →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0	0	0	0	6.6	6.6
Fe1	Fe	0.25	0.25
Ge1	Ge	0	0.3788

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

P. Schobinger-Papamantellos et al. Journal of Alloys and Compounds (1999) · doi:10.1016/S0925-8388(98)00914-1

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.369_HFe2Ge2.mcif from MAGNDATA · entry page

sha256 of this copy: b5d9045ca193227d81cdc26f03cfd33540ffb964a12fac8e9ca9cbf7ad6a074d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.369_HFe2Ge2.mcif.