Research/Sitter/MAGNDATA / 0.42_HoMnO3.mcif

HoMnO₃

MAGNDATA entry 0.42 · source

noncoplanar magnet

Spins pointing in three dimensions, not confined to a plane.

ordered ≤ 70 K (−203 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 6₃′c′ m BNS 185.199
Point group	6′mm′
Parent space group	P 6₃c m No. 185
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 6.2 · b 6.2 · c 11.4 Å · α 90° · β 90° · γ 120°
Transition	70 K (−203 °C)
Measured at	50 K
Magnetic ions	Ho, Mn
Largest moment component	2.84 μ_B
Method	polarized neutron diffraction - single crystal

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 6₃′c′ m →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0	0	0.2794
Ho2	Ho	0.3333	0.6667	0.2353	0	0	0.27	0.27
Mn1	Mn	0.3337	0	0	1.42	2.84	0	2.4595
O1	O	0.3071	0	0.1654
O2	O	0.6404	0	0.3381
O3	O	0	0	0.4183
O4	O	0.3333	0.6667	0.0232

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.J. Brown et al. J. Phys.: Condens. Matter (2006) · doi:10.1088/0953-8984/18/44/008

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.42_HoMnO3.mcif from MAGNDATA · entry page

sha256 of this copy: 65da0da7db519c18b2b08eb636a188186cc278dc884ec3ab32821346848ce926
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.42_HoMnO3.mcif.