Research/Sitter/MAGNDATA / 0.858_Tm2Fe17.mcif

Tm₂Fe₁₇

MAGNDATA entry 0.858 · source

s-wave ferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

Spin group ¹6/¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 275 K (2 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 6₃/m m′ c′ BNS 194.270
Point group	6/mm′m′
Parent space group	P 6₃/m m c No. 194
Spins	collinear · net moment 51 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.338 · b 8.338 · c 8.276 Å · α 90° · β 90° · γ 120°
Transition	275 K (2 °C)
Measured at	231 K
Magnetic ions	Fe, Tm
Largest moment component	1.5 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 6₃/m m′ c′ →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0.3333	0.6667	0.109	0	0	−1.5	1.5
Fe2	Fe	0.5	0	0	0	0	−1.5	1.5
Fe3	Fe	0.323	0.963	0.25	0	0	−1.5	1.5
Fe4	Fe	0.164	0.328	0.987	0	0	−1.5	1.5
Tm1	Tm	0	0	0.25
Tm2	Tm	0.3333	0.6667	0.75

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

J. R. A. A. Elemans et al. phys. stat. sol. (a) (1974) · doi:10.1002/pssa.2210240250

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.858_Tm2Fe17.mcif from MAGNDATA · entry page

sha256 of this copy: 21621f931823c574005a462cd42f3eeae4efff16f8a3b68b731cea46f65fa177
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.858_Tm2Fe17.mcif.