Research/Sitter/MAGNDATA / 0.729_ErNi4B.mcif

ErNi₄B

MAGNDATA entry 0.729 · 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 ≤ 10 K (−263 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 6/m m′ m′ BNS 191.240
Point group	6/mm′m′
Parent space group	P 6/m m m No. 191
Spins	collinear · net moment 17.4 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.9614 · b 4.9614 · c 6.936 Å · α 90° · β 90° · γ 120°
Transition	10 K (−263 °C)
Measured at	1.6 K
Magnetic ions	Er
Largest moment component	8.7 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 6/m m′ m′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0	0	0	0	0	8.7	8.7
Er2	Er	0	0	0.5	0	0	8.7	8.7
Ni1	Ni	0.3333	0.6667	0
Ni2	Ni	0.5	0	0.2899
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

⬇ 0.729_ErNi4B.mcif from MAGNDATA · entry page

sha256 of this copy: 65bb2885618c434afbd8646a66436ecd430525756b083ba97e992340e5be92fe
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.729_ErNi4B.mcif.