Research/Sitter/MAGNDATA / 0.380_SmFeO3.mcif

SmFeO₃

MAGNDATA entry 0.380 · source

d-wave altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion. d-wave: the splitting changes sign twice around the Fermi surface (2 nodal planes).

Spin group ²m¹m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 670 K (397 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n′ m a′ BNS 62.448
Parent space group	P n m a No. 62
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.4095 · b 5.6057 · c 7.7251 Å · α 90° · β 90° · γ 90°
Transition	670 K (397 °C)
Measured at	500 K
Magnetic ions	Fe
Largest moment component	2.8 μ_B
Method	NSD

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 · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sm1	Sm	0.4955	0.4434	0.75
Fe1	Fe	0	0.5	0	2.8	0	0	2.8
O1	O	0.55	0.0141	0.75
O2	O	0.7228	0.2898	0.0283

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

C.-Y. Kuo et al. Phys. Rev. Lett. (2014) · doi:10.1103/PhysRevLett.113.217203

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.380_SmFeO3.mcif from MAGNDATA · entry page

sha256 of this copy: ec18c3a97c5bfc50a5f464f35e5b2c12d8dcc0fc10aeb71b43b6bd7255c96db5
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.380_SmFeO3.mcif.