Research/Sitter/MAGNDATA / 1.904_GdCu2.mcif

GdCu₂

MAGNDATA entry 1.904 · source

p-wave magnet

Coplanar spins, no net moment, and a translation that reverses every spin: spin splitting that is odd in momentum (p-wave).

ordered ≤ 42 K (−231 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_I m n 2₁ BNS 31.134
Point group	mm21′
Parent space group	I m m a No. 74
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/3 0 0] 1k
Cell	a 12.915 · b 6.848 · c 7.306 Å · α 90° · β 90° · γ 90°
Transition	42 K (−231 °C)
Measured at	2 K
Magnetic ions	Gd
Largest moment component	6.9 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 m n 2₁ →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Gd1_1	Gd	0	0.25	0.5377	6.9	0	0	6.9
Gd1_2	Gd	0	0.75	0.4623	−6.9	0	0	6.9
Gd1_3	Gd	0.1667	0.75	0.0377	3.45	0	5.976	6.9004
Gd1_4	Gd	0.1667	0.25	0.9623	−3.45	0	−5.976	6.9004
Cu1_1	Cu	0	0.051	0.1648
Cu1_2	Cu	0	0.551	0.8352
Cu1_3	Cu	0.1667	0.551	0.6648
Cu1_4	Cu	0.1667	0.051	0.3352

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. Rotter et al. J. Magn. Magn. Mater. (2000) · doi:10.1016/S0304-8853(00)00051-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.904_GdCu2.mcif from MAGNDATA · entry page

sha256 of this copy: 5cb29458fd13d8487c195fc4877db5104d82ef5e9d19af5eb9f41710dda69469
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.904_GdCu2.mcif.