Research/Sitter/MAGNDATA / 1.746_YMn2.mcif

Y₁Mn₂

MAGNDATA entry 1.746 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 100 K (−173 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C 2₁ BNS 4.12
Point group	21′
Parent space group	F d 3 m No. 227
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1 0] 1k
Cell	a 7.692 · b 7.692 · c 7.692 Å · α 90° · β 90° · γ 90°
Transition	100 K (−173 °C)
Measured at	4.2 K
Magnetic ions	Mn
Largest moment component	1.56 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_C 2₁ →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1_1	Mn	0.625	0.625	0.625	1.56	1.56	1.56	2.702
Mn1_2	Mn	0.375	0.875	0.125	−1.56	−1.56	−1.56	2.702
Mn1_3	Mn	0.875	0.125	0.375	1.56	1.56	1.56	2.702
Y1	Y	0.25	0.25	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

Y. Nakamura et al. Physica B (1983) · doi:10.1016/0378-4363(83)90376-5

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.746_YMn2.mcif from MAGNDATA · entry page

sha256 of this copy: dbd9cf9ff41856795615a378e6287f50c177a1608cde99ed0a5ec00f22492a84
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.746_YMn2.mcif.

Y1Mn2

Symmetry

Source

Original file

Y₁Mn₂