Research/Sitter/MAGNDATA / 0.821_SrGd2O4.mcif

SrGd₂O₄

MAGNDATA entry 0.821 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 2.7 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P n m a′ BNS 62.445
Point group	m′mm
Parent space group	P n m a No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.1 · b 12.0395 · c 3.4682 Å · α 90° · β 90° · γ 90°
Transition	2.73 K (−270 °C)
Measured at	1.63 K
Magnetic ions	Gd
Largest moment component	6.8 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 n m a′ →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1	Sr	0.7496	0.1489	0.75
Gd1	Gd	0.0737	0.6135	0.75	0	0	−6.8	6.8
Gd2	Gd	0.0813	0.1116	0.75	0	0	−4.59	4.59
O1	O	0.7815	0.8201	0.75
O2	O	0.87	0.5167	0.75
O3	O	0.9901	0.2855	0.75
O4	O	0.5715	0.5778	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

N. Qureshi et al. PHYSICAL REVIEW B (2022) · doi:10.1103/PhysRevB.105.014425

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.821_SrGd2O4.mcif from MAGNDATA · entry page

sha256 of this copy: 9808ccff4a641da0e0b198b4ab9159d7d8ccf103f742a3cf9ab9540d7170c8f5
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.821_SrGd2O4.mcif.