Research/Sitter/MAGNDATA / 0.577_BaMnFeF7.mcif

BaMnFeF₇

MAGNDATA entry 0.577 · source

s-wave compensated ferrimagnet

Opposite moments cancel, but the two sublattices aren't related by any symmetry, so the bands split like a ferromagnet's (s-wave).

Spin group ¹2/¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 84.9 K (−188 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 2₁′/c′ BNS 14.79
Parent space group	P 2₁/c No. 14
Spins	collinear · net moment 0.558 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.5075 · b 10.9584 · c 9.1427 Å · α 90° · β 94.57° · γ 90°
Transition	84.9 K (−188 °C)
Measured at	2 K
Magnetic ions	Fe, Mn
Largest moment component	4.1 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 2₁′/c′ →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ba1	Ba	0.228	0.1685	0.0425
Mn1	Mn	0.8103	0.0631	0.3803	−0.58	0	−4.09	4.0849
Fe1	Fe	0.6926	0.1205	0.7665	0.72	0	4.1	4.1058
F1	F	0.404	0.2823	0.2853
F2	F	0.4993	0.0299	0.2515
F3	F	0.1445	0.3996	0.0107
F4	F	0.9837	0.4835	0.2807
F5	F	0.0972	0.7378	0.2144
F6	F	0.3466	0.6469	0.9398
F7	F	0.7159	0.4053	0.4754

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

P. Lacorre et al. JOURNAL OF SOLID STATE CHEMISTRY (1992) · doi:10.1016/0022-4596(92)90185-X

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.577_BaMnFeF7.mcif from MAGNDATA · entry page

sha256 of this copy: 1fc94128a9c432dfab85cd2c49a518dae8d506789c0c900ad5c6951e2bf24de4
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.577_BaMnFeF7.mcif.