A neutron diffraction and Moessbauer effect study of the magnetic structure of Y sub 2 (Fe sub 1 minus x Mn sub x ) sub 14 B

Journal Article · Fri Nov 15 04:00:00 EST 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.350025· OSTI ID:5124236

Marasinghe, G K; Pringle, O A; Long, G J; James, W J ^[1]; Yelon, W B ^[2]; Grandjean, F ^[3]

---

1. Departments of Physics and Chemistry, University of Missouri-Rolla, Rolla, Missouri (USA)
2. University of Missouri Research Reactor, Columbia, Missouri (USA)
3. Institut de Physique, Universite de Leige, B-4000 Sart Tilman (Belgium)

The magnetic structures of a series of Y{sub 2}(Fe{sub 1{minus}{ital x}}Mn{sub {ital x}}){sub 14}B samples, with {ital x} equal to 0.03, 0.10, 0.25, and 0.37, have been studied by powder neutron diffraction and Moessbauer spectroscopy. Y{sub 2}(Fe{sub 0.97}Mn{sub 0.03}){sub 14}B and Y{sub 2}(Fe{sub 0.9}Mn{sub 0.1}){sub 14}B are ferromagnetic at both 295 and 85 K, Y{sub 2}(Fe{sub 0.63}Mn{sub 0.37}){sub 14}B is paramagnetic at both 295 and 85 K, whereas Y{sub 2}(Fe{sub 0.75}Mn{sub 0.25}){sub 14}B is paramagnetic at 295 K and is partially ordered at 78 K. The magnetic structure of Y{sub 2}(Fe{sub 0.75}Mn{sub 0.25}){sub 14}B is explained in terms of the preferential Mn occupancy of the transition metal 8{ital j}{sub 2} site in the Y{sub 2}Fe{sub 14}B structure. Small amounts of Mn located in this site are very effective in disrupting the long-range ferromagnetic coupling.

• OSTI ID: 5124236
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:10; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BORIDES
BORON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRONIC STRUCTURE
IRON BORIDES
IRON COMPOUNDS
MAGNETIC PROPERTIES
MANGANESE BORIDES
MANGANESE COMPOUNDS
MOESSBAUER EFFECT
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
SCATTERING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM BORIDES
YTTRIUM COMPOUNDS