Research/Sitter/MAGNDATA / 2.28_NpNiGa5.mcif

NpNiGa₅

MAGNDATA entry 2.28 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 18 K (−255 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I m m′ a′ BNS 74.559
Parent space group	P 4/m m m No. 123
Spins	coplanar · net moment 4.72 μ_B per cell
Propagation	[0 0 0] · [1/2 1/2 1/2] 2k
Cell	a 8.4706 · b 8.4706 · c 13.5716 Å · α 90° · β 90° · γ 90°
Transition	18 K (−255 °C)
Measured at	4 K
Magnetic ions	Ni, Np
Largest moment component	0.59 μ_B
Method	Polarized NSD

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 m m′ a′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Np1	Np	0	0	0	0.42	0.42	0.59	0.8372
Ni1	Ni	0	0	0.25
Ga1	Ga	0.25	0.25	0
Ga2_1	Ga	0	0.25	0.153
Ga2_2	Ga	0	0.25	0.8469

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

F. Honda et al. Phys. rev. B (2006) · doi:10.1103/PhysRevB.74.144413

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.28_NpNiGa5.mcif from MAGNDATA · entry page

sha256 of this copy: 50549a8d331d0bae4c3a5d387bb58d41c89d0c570fd23170c18ffe5a9c73e2f5
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.28_NpNiGa5.mcif.