#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es


data_5yOhtAoR
_audit_creation_date            2018-03-21
_audit_creation_method          "Bilbao Crystallographic Server"

_citation_journal_abbrev        "PHYSICAL REVIEW B"
_citation_journal_volume        91
_citation_page_first            ?
_citation_page_last             ?
_citation_article_id            064418
_citation_year                  2015
_citation_DOI                   10.1103/PhysRevB.91.064418

loop_
_citation_author_name
"Q. Zhang"
"W. Tian"
"S.G. Peterson"
"K.W. Dennis"
"D. Vaknin"




_atomic_positions_source_database_code_ICSD  195499
_atomic_positions_source_other               .

_transition_temperature  7
_experiment_temperature  2

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mGM5-  2  2  general  primary  4  .

_exptl_crystal_magnetic_properties_details
;
NPD
Above 2K  Mn and Ce spins are collinear, corresponding to a special direction of the order parameter for the same active irrep, with a higher symmetry (see #0.187). Above 35K only Mn spins are ordered along c (see #0.186).
;

_active_magnetic_irreps_details
;
2-dim irrep active
Non-collinear structure
Absolute spin direction on the ab plane cannot be determined; the direction of the Mn spin is arbitrarily fixed. Only the relative orientation of the Ce and Mn spins can be determined (approximately 20 degrees)
;

_parent_space_group.name_H-M_alt  'P  4/n  m  m'
_parent_space_group.IT_number                       129
_parent_space_group.transform_Pp_abc  'a,b,c;0,0,0'

loop_
_parent_propagation_vector.id
_parent_propagation_vector.kxkykz
k1 [0 0 0]

_parent_space_group.child_transform_Pp_abc  'a,b,c;0,0,0'
_space_group_magn.transform_BNS_Pp_abc  'a,c,a-b;0,0,0'

_space_group_magn.number_BNS  13.67
_space_group_magn.name_BNS  "P2'/c"
_cell_length_a             4.08370
_cell_length_b             4.08370
_cell_length_c             8.95670
_cell_angle_alpha          90.00
_cell_angle_beta           90.00
_cell_angle_gamma          90.00

loop_
_space_group_symop_magn_operation.id
_space_group_symop_magn_operation.xyz
1 x,y,z,+1
2 x+1/2,y+1/2,-z,+1
3 -x+1/2,-y+1/2,z,-1
4 -x,-y,-z,-1

loop_
_space_group_symop_magn_centering.id
_space_group_symop_magn_centering.xyz
1 x,y,z,+1

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ce1 Ce 0.25000 0.25000 0.12870
Mn1 Mn 0.75000 0.25000 0.50000
As1 As 0.25000 0.25000 0.67200
O1 O 0.75000 0.25000 0.00000

loop_
_atom_site_moment.label
_atom_site_moment.crystalaxis_x
_atom_site_moment.crystalaxis_y
_atom_site_moment.crystalaxis_z
_atom_site_moment.symmform
Ce1 0.7 0.3 0.00000 mx,my,0
Mn1 -3.32 0.00000 0.00000 mx,my,0


