Research/Sitter/MAGNDATA / 0.4_NiCr2O4.mcif

NiCr₂O₄

MAGNDATA entry 0.4 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹4/¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 74 K (−199 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	F d′ d′ d BNS 70.530
Point group	m′m′m
Parent space group	I 4₁/a m d No. 141
Spins	collinear · net moment 4.639 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.8102 · b 5.8102 · c 8.4806 Å · α 90° · β 90° · γ 90°
Transition	74 K (−199 °C)
Magnetic ions	Cr, Ni
Largest moment component	1.16 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 F d′ d′ d →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ni1	Ni	0.25	0.375	1.16	1.16	0	1.6405
Cr1	Cr	0	0	−0.99	−0.99	0	1.4001
O1	O	0.9821	0.2337

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

Tomiyasu, K. et al. J. Phys. Soc Jpn (2004)

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.4_NiCr2O4.mcif from MAGNDATA · entry page

sha256 of this copy: 9fefc02dde01d137af8613fd00142f1f4c19e60043e5de482b7a01e140bb11a0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.4_NiCr2O4.mcif.