Research/Sitter/MAGNDATA / 1.7_NdFe3B4O12.mcif

NdFe₃B₄O₁₂

MAGNDATA entry 1.7 · 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 ¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 30 K (−243 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_c 2 BNS 5.16
Point group	21′
Parent space group	R 32 No. 155
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 3/2] 1k
Cell	a 9.578 · b 9.578 · c 15.21 Å · α 90° · β 90° · γ 120°
Transition	30 K (−243 °C)
Measured at	20 K
Magnetic ions	Fe, Nd
Largest moment component	3.8 μ_B
Method	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 C_c 2 →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	\|m\| (μ_B)
Nd1	Nd	0	0	0	0.5	0.5
Fe1	Fe	0.3333	0.2178	0.3333	3.8	3.8
Fe2	Fe	0.5511	0	0	3.8	3.8

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. Janoschek et al. Phys. Rev. B (2010) · doi:10.1103/physrevb.81.094429

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.7_NdFe3B4O12.mcif from MAGNDATA · entry page

sha256 of this copy: 1debb6cc69e6cb4c2347654fa4c1c9fcc2384754ba8fd78ebb865dd2c9f1b901
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.7_NdFe3B4O12.mcif.