Research/Sitter/MAGNDATA / 1.668_HoCoGa5.mcif

Ho₁Co₁Ga₅

MAGNDATA entry 1.668 · 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 ≤ 7.5 K (−266 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_a m m a BNS 67.509
Point group	mmm1′
Parent space group	P 4/m m m No. 123
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 8.414 · b 4.207 · c 13.59 Å · α 90° · β 90° · γ 90°
Transition	7.5 K (−266 °C)
Measured at	3.5 K
Magnetic ions	Ho
Largest moment component	8.6 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_a m m a →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0	0	0	0	0	8.6	8.6
Co1	Co	0	0	0.25
Ga1	Ga	0.25	0.5	0
Ga2_1	Ga	0	0.5	0.156
Ga2_2	Ga	0.25	0	0.156

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

R. Kobayashi et al. Journal of the Korean Physical Society (2013) · doi:10.3938/jkps.63.337

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.668_HoCoGa5.mcif from MAGNDATA · entry page

sha256 of this copy: abcbb64b4973096ac113b6ef940b81c2f928a400e68aaa8e32bb7e8b6942d007
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.668_HoCoGa5.mcif.

Ho1Co1Ga5

Symmetry

Source

Original file

Ho₁Co₁Ga₅