Research/Sitter/MAGNDATA / 0.894_Ni0.85Cu0.15Cr2O4.mcif

Ni_0.85Cu_0.15Cr₂O₄

MAGNDATA entry 0.894 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 85 K (−188 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2′/c′ BNS 15.89
Point group	2′/m′
Parent space group	I 4₁/a m d No. 141
Spins	coplanar · net moment 10.4 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.0565 · b 8.3129 · c 8.5384 Å · α 90° · β 90° · γ 90°
Transition	85 K (−188 °C)
Measured at	2 K
Magnetic ions	Cr, Cu, Ni
Largest moment component	1.88 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 2′/c′ →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ni1	Ni	0.125	0.125	0.125	−1.88	0	0	1.88
Cu1	Cu	0.125	0.125	0.125	−1.88	0	0	1.88
Cr1_1	Cr	0.5	0.5	0.5	1.23	0	1.83	2.2049
Cr1_2	Cr	0.25	0.5	0.25	1.23	0	−1.83	2.2049
O1_1	O	0.2557	0.2615	0.2676
O1_2	O	0.2557	−0.0115	−0.0176

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

M. Reehuis et al. PHYSICAL REVIEW B? (2015) · doi:10.1103/PhysRevB.91.024407

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.894_Ni0.85Cu0.15Cr2O4.mcif from MAGNDATA · entry page

sha256 of this copy: ef11dd11ca81b845016f7a6187b4b891d810ee339d59b8c37ec0dbecc20b053a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.894_Ni0.85Cu0.15Cr2O4.mcif.