Research/Sitter/MAGNDATA / 1.294_HoNi2B2C.mcif

HoNi₂B₂C

MAGNDATA entry 1.294 · 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 ≤ 5 K (−268 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_A m c a BNS 64.480
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1] 1k
Cell	a 3.5177 · b 3.5177 · c 10.5278 Å · α 90° · β 90° · γ 90°
Transition	5 K (−268 °C)
Measured at	1.7 K
Magnetic ions	Ho
Largest moment component	6.095 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 c a →

Atom sites · 4 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0	0	6.095	−6.095	0	8.6196
Ni1	Ni	0.5	0.25
B1	B	0	0.3592
C1	C	0	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

J. W. Lynn et al. PHYSICAL REVIEW B (1997) · doi:10.1103/PhysRevB.55.6584

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.294_HoNi2B2C.mcif from MAGNDATA · entry page

sha256 of this copy: cbedcf3bf97081e61c2427f714aaecef850935911fbdda615502b68bb0667453
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.294_HoNi2B2C.mcif.