Effect of Ga substitution on the magnetic properties of Nd/sub 2/Fe/sub 14/B, Pr/sub 2/Fe/sub 14/B, and PrCo/sub 5/

Journal Article · Fri Apr 15 00:00:00 EDT 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340643· OSTI ID:5328620

Pedziwiatr, A T; Sankar, S G; Wallace, W E

R/sub 2/Fe/sub 14-//sub x/Ga/sub x/B (R = Pr and Nd) and PrCo/sub 5-//sub x/Ga/sub x/ alloys were synthesized and examined by powder x-ray diffraction at room temperature and by magnetometry in the temperature range 4.2--1100 K. Lattice parameters, Curie temperature, spin-reorientation temperatures, anisotropy fields, and saturation magnetizations were determined. Phase analysis revealed that single-phase materials exist only for xless than or equal to1 in the case of 2:14:1 alloys and for xless than or equal to2 for 1:5 alloys. An increase in lattice parameters is observed upon Ga substitution in all cases. About 20 K increase in the Curie temperature is observed for 2:14:1 alloys, whereas there is a dramatic decrease in 1:5 alloys. Saturation magnetization values decrease upon Ga substitution. The anisotropy field is slightly enhanced by Ga addition in the Nd/sub 2/Fe/sub 14-//sub x/Ga/sub x/B system. Spin-reorientation phenomena in Nd/sub 2/Fe/sub 14-//sub x/Ga/sub x/B and PrCo/sub 5-//sub x/Ga/sub x/ are strongly affected by Ga addition. The observed behavior is discussed in terms of preferential substitution of Ga atoms into the Nd/sub 2/Fe/sub 14/B-type crystal structure and random substitution into the CaCu/sub 5/-type crystal structure.

• Research Organization: Mellon Institute and Metallurgical Engineering and Materials Science Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
• OSTI ID: 5328620
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
BORON ALLOYS
COBALT ALLOYS
COHERENT SCATTERING
CURIE POINT
DIFFRACTION
GALLIUM ALLOYS
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETS
NEODYMIUM ALLOYS
PERMANENT MAGNETS
PHASE STUDIES
PHYSICAL PROPERTIES
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
SCATTERING
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION