Research/Sitter/MAGNDATA / 0.713_NiFe2O4.mcif

NiFe₂O₄

MAGNDATA entry 0.713 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹m¹3̄¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 858 K (585 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I 4₁/a m′ d′ BNS 141.557
Parent space group	F d 3 m No. 227
Spins	collinear · net moment 107.44 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.33099 · b 8.33099 · c 8.33099 Å · α 90° · β 90° · γ 90°
Transition	858 K (585 °C)
Measured at	293 K
Magnetic ions	Fe, Ni
Largest moment component	3.96 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 I 4₁/a m′ d′ →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0.125	0.125	0.125	0	0	2.41	2.41
Ni1	Ni	0.5	0.5	0.5	0	0	−3.96	3.96
Fe2	Fe	0.5	0.5	0.5	0	0	−3.96	3.96
O1	O	0.2563	0.2563	0.2563

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

B. Sattibabu et al. Materials Letters (2020) · doi:10.1016/j.matlet.2020.128325

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.713_NiFe2O4.mcif from MAGNDATA · entry page

sha256 of this copy: 2313fb55dd1638484c7e2f7aed676508e5ff8a4e14e7ca1e032a081dd2a42827
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.713_NiFe2O4.mcif.