Research/Sitter/MAGNDATA / 1.124_YBaFe4O7.mcif

YBaFe₄O₇

MAGNDATA entry 1.124 · 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 ≤ 95 K (−178 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_a 2₁ BNS 4.10
Point group	21′
Parent space group	P 2₁ No. 4
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 6.2646 · b 9.111 · c 12.4136 Å · α 90° · β 89.365° · γ 90°
Transition	95 K (−178 °C)
Measured at	4 K
Magnetic ions	Fe
Largest moment component	3.11 μ_B
Method	Monoclinic paramagnetic phase. Tetragonal phase with space group I-4 above 180K.

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_a 2₁ →

Atom sites · 13 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Y1	Y	0.75	0.75	0.127
Ba1	Ba	0.736	0.5	0.3765
Fe1	Fe	0.735	0.13	0.002	0	−2.63	0	2.63
Fe2	Fe	0.491	0.378	0.135	0	−3.11	0	3.11
Fe3	Fe	0.981	0.369	0.116	0	2.58	0	2.58
Fe4	Fe	0.774	0.14	0.2345	−1.2	−1.66	1.24	2.3875
O1	O	0.749	0.5	0.1175
O2	O	0.735	0	0.1245
O3	O	0.536	0.264	0.2625
O4	O	0.947	0.284	0.4685
O5	O	0.063	0.214	0.2245
O6	O	0.47	0.234	0.0215
O7	O	0.75	0.007	0.375

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

V. Duffort et al. Journal ofSolid State Chemistry (2013) · doi:10.1016/j.jssc.2013.06.002

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.124_YBaFe4O7.mcif from MAGNDATA · entry page

sha256 of this copy: 65a8e0e079bfccb1ceb135d545e1c4457b4cd772fc0ca86c388fd4be6b718608
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.124_YBaFe4O7.mcif.