Research/Sitter/MAGNDATA / 0.731_HoNi4B.mcif

HoNi₄B

MAGNDATA entry 0.731 · source

s-wave ferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

Spin group ¹6/¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 6.2 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2′/m′ BNS 12.62
Point group	2′/m′
Parent space group	P 6/m m m No. 191
Spins	collinear · net moment 13.398 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.9696 · b 4.9696 · c 6.9419 Å · α 90° · β 90° · γ 120°
Transition	6.2 K (−267 °C)
Measured at	1.6 K
Magnetic ions	Ho
Largest moment component	5.915 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 2′/m′ →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0	0	0	5.915	0	3.145	6.6991
Ho2	Ho	0	0	0.5	5.915	0	3.145	6.6991
Ni1	Ni	0.3333	0.6667	0
Ni2_1	Ni	0.5	0	0.2091
Ni2_2	Ni	0	0.5	0.2091
B1	B	0.3333	0.6667	0.5

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

E. Alleno et al. J. Solid State Chem. (2013) · doi:10.1016/j.jssc.2013.03.003

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.731_HoNi4B.mcif from MAGNDATA · entry page

sha256 of this copy: d33a338fd928e3fcabf5d14fd161f7ef0ef60e3ac880e313ca23459056e84452
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.731_HoNi4B.mcif.