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), Vol. 63:8
• Country of Publication: United States
• Language: English

Related Subjects

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