I — Parameter refinement at 400 K and magnetic moments at room temperature of some rare earth iron garnets RIG (R = Dy, Er, Yb, Tm) by neutron diffraction

Rare earth intermetallic compound Sm2Fe17N3 exhibits notalble magnetic properties such as high Curie temperature and high coercivity which are very suitable for permanent magnets [1,2]. Although microscopic magnetic structure is one of the basic information for magnetic materials, there is no report about the magnetic structure of Sm2Fe17N3 for our knowledge. This is because samarium's neutron absorption cross section is huge enough to make researchers hesitate to have neutron diffraction experiments of Sm compounds. We have carried out powder neutron diffraction measurement of Sm2Fe17N3 with a straightforward solution to the problem by taking long measurement time. Synchrotron x-ray diffraction measurements with single crystal has also been done to obtain initial crystal structure parameters for magnetic structure analysis and we have succeeded to analyze the magnetic structure of Sm2Fe17N3 at room temperature. Among four Fe sites in the unit cell, while one Fe site which is the nearest neighbor of nitrogen shows smaller magnetic moment than normal iron, two Fe sites show enhancement in their magnetic moments. This phenomenon can be understood as 'cobaltization' of Fe by the adjacent nitrogen through hybridization.

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Magnetic Moments of Some Mixed Rare Earth Iron Garnets

Japanese Journal of Applied Physics ◽

10.1143/jjap.1.243 ◽

1962 ◽

Vol 1 (5) ◽

pp. 243-248 ◽

Cited By ~ 11

Author(s):

Joseph Perel ◽

Michael Schieber

Keyword(s):

Rare Earth ◽

Magnetic Moments ◽

Iron Garnets

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II — Neutron diffraction study of some rare earth iron garnets RIG (R = Dy, Er, Yb, Tm) at low temperatures

Solid State Communications ◽

10.1016/0038-1098(70)90389-3 ◽

1970 ◽

Vol 8 (21) ◽

pp. 1751-1758 ◽

Cited By ~ 40

Author(s):

F. Tcheou ◽

E.F. Bertaut ◽

H. Fuess

Keyword(s):

Rare Earth ◽

Neutron Diffraction ◽

Diffraction Study ◽

Low Temperatures ◽

Neutron Diffraction Study ◽

Iron Garnets

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Magnetic moments of yttrium-iron garnets containing light rare earth ions

Journal of Physics and Chemistry of Solids ◽

10.1016/0022-3697(61)90040-3 ◽

1961 ◽

Vol 19 (3-4) ◽

pp. 304-307 ◽

Cited By ~ 10

Author(s):

A. Aharoni ◽

M. Schieber

Keyword(s):

Rare Earth ◽

Magnetic Moments ◽

Rare Earth Ions ◽

Light Rare Earth ◽

Yttrium Iron ◽

Iron Garnets ◽

Yttrium Iron Garnets

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Crystal and magnetic structures of R 2Ni1.78In compounds (R = Tb, Ho, Er and Tm)

Acta Crystallographica Section B Structural Science Crystal Engineering and Materials ◽

10.1107/s2052520621008179 ◽

2021 ◽

Vol 77 (5) ◽

pp. 824-832

Author(s):

Stanisław Baran ◽

Aleksandra Deptuch ◽

Andreas Hoser ◽

Bogusław Penc ◽

Yuriy Tyvanchuk ◽

...

Keyword(s):

Rare Earth ◽

Neutron Diffraction ◽

Magnetic Structure ◽

Magnetic Moments ◽

Symmetry Analysis ◽

Crystalline Electric Field ◽

Magnetic Structures ◽

Antiferromagnetic Ordering ◽

Crystal And Magnetic Structures ◽

The Rare Earth

The crystal and magnetic structures in R 2Ni1.78In (R = Ho, Er and Tm) have been studied by neutron diffraction. The compounds crystallize in a tetragonal crystal structure of the Mo2FeB2 type (space group P4/mbm). At low temperatures, the magnetic moments, localized solely on the rare earth atoms, form antiferromagnetic structures described by the propagation vector k = [kx , kx , ½], with kx equal to ¼ for R = Er and Tm or 0.3074 (4) for R = Ho. The magnetic moments are parallel to the c axis for R = Ho or lie within the (001) plane for R = Er and Tm. The obtained magnetic structures are discussed on the basis of symmetry analysis. The rare earth magnetic moments, determined from neutron diffraction data collected at 1.6 K, are 6.5 (1) μB (Er) and 6.09 (4) μB (Tm), while in the incommensurate modulated magnetic structure in Ho2Ni1.78In the amplitude of modulation of the Ho magnetic moment is 7.93 (8) μB. All these values are smaller than those expected for the respective free R 3+ ions. A symmetry analysis of the magnetic structure in Tb2Ni1.78In is also included, as such information is missing from the original paper [Szytuła, Baran, Hoser, Kalychak, Penc & Tyvanchuk (2013). Acta Phys. Pol. A, 124, 994–997]. In addition, the results of magnetometric measurements are reported for Tm2Ni1.78In. The compound shows antiferromagnetic ordering below the Néel temperature of 4.5 K. Its magnetic properties are found to originate from magnetic moments localized solely on the thulium atoms (the nickel atoms remain non-magnetic in Tm2Ni1.78In). The reduction of rare earth magnetic moments in the ordered state in R 2Ni1.78In (R = Tb, Ho, Er and Tm) and the change in direction of the moments indicate the influence of the crystalline electric field (CEF) on the stability of the magnetic order in the investigated compounds.

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