Research/Sitter/MAGNDATA / 1.687_Er2Ni2Pb.mcif

Er₂Ni₂Pb

MAGNDATA entry 1.687 · 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 ≤ 1.8 K (−271 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_c m c m BNS 63.466
Point group	mmm1′
Parent space group	C m m m No. 65
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 4.0021 · b 13.8984 · c 7.2222 Å · α 90° · β 90° · γ 90°
Transition	1.8 K (−271 °C)
Measured at	1.5 K
Magnetic ions	Er
Largest moment component	1.9 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_c m c m →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0.3603	0.25	0	1.9	0	1.9
Ni1	Ni	0.2	0
Pb1	Pb	0	0

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

K. Prokes et al. PHYSICAL REVIEW B (2008) · doi:10.1103/PhysRevB.78.014425

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.687_Er2Ni2Pb.mcif from MAGNDATA · entry page

sha256 of this copy: 3be01fa68f50640d5b68247b7c897ec6065babb5fc20fae5878e41fb1e7e2822
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.687_Er2Ni2Pb.mcif.