Research/Sitter/MAGNDATA / 0.48_Tb2Sn2O7.mcif

Tb₂Sn₂O₇

MAGNDATA entry 0.48 · source

noncoplanar ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 0.9 K (−272 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I 4₁/a m′ d′ BNS 141.557
Point group	4/mm′m′
Parent space group	F d 3m No. 227
Spins	noncoplanar · net moment 35.2 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.426 · b 10.426 · c 10.426 Å · α 90° · β 90° · γ 90°
Transition	0.87 K (−272 °C)
Measured at	0.1 K
Magnetic ions	Tb
Largest moment component	3.85 μ_B
Method	Pyrochlore

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 I 4₁/a m′ d′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb	Tb	0.5	0.5	0.5	3.85	3.85	2.2	5.8724
Sn	Sn	0	0	0
O1_1	O	0.336	0.125	0.125
O1_2	O	0.125	0.125	0.336
O2	O	0.375	0.375	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

I. Mirebeau et al. PHYSICAL REVIEW LETTERS (2005) · doi:10.1103/physrevlett.94.246402

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.48_Tb2Sn2O7.mcif from MAGNDATA · entry page

sha256 of this copy: 966ab298449c621f9ee9a75614612a266c7a5fc1b5bdd5d17c303306da28eb13
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.48_Tb2Sn2O7.mcif.