Research/Sitter/MAGNDATA / 1.364_HoCu2Si2.mcif

HoCu₂Si₂

MAGNDATA entry 1.364 · 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 ¹2/¹m × ²1: 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 · 10 properties

Magnetic group	P_S 1 BNS 2.7
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 7.862 · b 3.931 · c 19.852 Å · α 90° · β 90° · γ 90°
Transition	10 K (−263 °C)
Measured at	4.2 K
Magnetic ions	Ho
Largest moment component	8.74 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_S 1 →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0	0	8.74	1.11	0	8.8102
Cu1	Cu	0.5	0.125
Si1	Si	0	0.1893

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

J. Leciejewicz et al. Journal of Magnetism and Magnetic Materials (1986) · doi:?10.1016/0304-8853(86)90174-5

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.364_HoCu2Si2.mcif from MAGNDATA · entry page

sha256 of this copy: db25909dad564ce5debe84f3fb1f62f999e8c3c9e119d51856c914142f1c724f
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.364_HoCu2Si2.mcif.