Research/Sitter/MAGNDATA / 2.83_ErMn2Ge2.mcif

ErMn₂Ge₂

MAGNDATA entry 2.83 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 8 K (−265 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P m′ m′ n BNS 59.409
Point group	m′m′m
Parent space group	I 4/m m m No. 139
Spins	coplanar · net moment 15.4 μ_B per cell
Propagation	[1 1 1] · [0 0 0] 2k
Cell	a 3.881 · b 3.881 · c 10.627 Å · α 90° · β 90° · γ 90°
Transition	8 K (−265 °C)
Measured at	4.2 K
Magnetic ions	Er, Mn
Largest moment component	7.7 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 m′ m′ n →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0	0	7.7	0	0	7.7
Mn1	Mn	0.5	0.25	0	0	2.3	2.3
Ge1	Ge	0	0.3885

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. Leciejewicz et al. Journal of Magnetism and Magnetic Materials (1984) · doi:10.1016/0304-8853(84)90317-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.83_ErMn2Ge2.mcif from MAGNDATA · entry page

sha256 of this copy: e6d194bc7ca352f1226a013c19b4601358b0eb40fa23511ae0415573e6b77abd
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.83_ErMn2Ge2.mcif.