Research/Sitter/MAGNDATA / 1.198_Ni1.64Co0.36Mn1.28Ga0.72.mcif

Ni_1.64Co_0.36Mn_1.28Ga_0.72

MAGNDATA entry 1.198 · 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 ≤ 450 K (177 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_I 4₂/m n m BNS 136.506
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 1 1] 1k
Cell	a 3.858 · b 3.858 · c 6.6083 Å · α 90° · β 90° · γ 90°
Transition	450 K (177 °C)
Measured at	285 K
Magnetic ions	Co, Mn, Ni
Largest moment component	0.97 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 P_I 4₂/m n m →

Atom sites · 5 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0
Ga1	Ga	0	0.5
Mn2	Mn	0	0.5
Ni1	Ni	0.5	0.25	0	0	−0.97	0.97
Co1	Co	0.5	0.25	0	0	−0.97	0.97

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. Orlandi et al. PHYSICAL REVIEW B (2016) · doi:10.1103/PhysRevB.94.140409

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.198_Ni1.64Co0.36Mn1.28Ga0.72.mcif from MAGNDATA · entry page

sha256 of this copy: 2b3ef59d6b74731b51dfbe3905d9757fae1ac9ed208a56b24196a20e9db100fb
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.198_Ni1.64Co0.36Mn1.28Ga0.72.mcif.