Research/Sitter/MAGNDATA / 1.40_SrNdFeO4.mcif

SrNdFeO₄

MAGNDATA entry 1.40 · 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 ≤ 360 K (87 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_A c c m BNS 66.500
Point group	mmm1′
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 5.4435 · b 5.4435 · c 12.4822 Å · α 90° · β 90° · γ 90°
Transition	360 K (87 °C)
Measured at	40 K
Magnetic ions	Fe, Nd
Largest moment component	4.11 μ_B
Method	structure proposed from magnetic properties (no diffraction)

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 C_A c c m →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1_1	Sr	0.5	0	0.8591
Nd1_1	Nd	0.5	0	0.8591
Fe1_1	Fe	0.5	0.5	0	0	4.11	0	4.11
O1_1	O	0.75	0.25	0
O2_1	O	0.5	0	0.6709

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

S. Oyama et al. J. Phys.: Condens. Matter (2004) · doi:10.1088/0953-8984/16/10/014

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.40_SrNdFeO4.mcif from MAGNDATA · entry page

sha256 of this copy: 9216f3be81345b3850795d9b8ff4fc18c506fcc241095edb96b6b32c09721f89
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.40_SrNdFeO4.mcif.