Microstructure and magnetostriction of (Dy{sub 0.7}Tb{sub 0.3}){sub 1{minus}{ital x}}Pr{sub {ital x}}Fe{sub 1.85} and (Dy{sub 0.7}Tb{sub 0.3}){sub 0.7}Pr{sub 0.3}Fe{sub {ital y}} alloys

Journal Article · Fri Nov 01 00:00:00 EST 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.117282· OSTI ID:397397

Wang, B W ^[1]; Tang, S L; Jin, X M ^[2]; Cheng, L Z; He, K Y ^[1]

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1. Department of Material Science and Engineering, Northeastern University, Shenyang 110006, People`s Republic of (China)
2. Institute of Metal Research, Academica Sinica, Shenyang 110015, People`s Republic of (China)

The structure, Curie temperature, and magnetostriction of R{sub 1{minus}{ital x}}Pr{sub {ital x}}Fe{sub 1.85} and R{sub 0.7}Pr{sub 0.3}Fe{sub {ital y}} ({ital R}=Dy{sub 0.7}Tb{sub 0.3}, {ital x}{le}0.5, 1.55{le}{ital y}{le}1.85) alloys were investigated. The matrix of R{sub 1{minus}{ital x}}Pr{sub {ital x}}Fe{sub 1.85} alloys is the MgCu{sub 2}-type cubic (Dy,Tb,Pr) Fe{sub 2} and the second phase was found to be (Dy,Tb,Pr) Fe{sub 3} when {ital x}{le}0.3. When {ital x}{gt}0.4, (Dy,Tb,Pr)Fe{sub 3} is the main phase with the PuNi{sub 3}-type structure and (Dy,Tb,Pr) Fe{sub 2} becomes the minority phase. In the range of 0.3{lt}{ital x}{le}0.4, both MgCu{sub 2}- and PuNi{sub 3}-type structures coexist. The R{sub 0.7}Pr{sub 0.3}Fe{sub {ital y}} alloys contain a small amount of (Dy,Tb,Pr) Fe{sub 3} phase when {ital y}{gt}1.55, which increases with increasing {ital y}. When {ital y}=1.55, the alloy is essentially single phase with the MgCu{sub 2}-type cubic structure. The lattice parameter of (Dy,Tb,Pr)Fe{sub 2} compound for R{sub 1{minus}{ital x}}Pr{sub {ital x}}Fe{sub 1.85} alloys increases slowly with increasing {ital x} when {ital x}{le}0.3, and sharply increases when {ital x}{gt}0.3. The Curie temperature of the alloys decreases steadily with increasing Pr content. The magnetostrictions of R{sub 1{minus}{ital x}}Pr{sub {ital x}}Fe{sub 1.85} and R{sub 0.7}Pr{sub 0.3}Fe{sub {ital y}} alloys decrease with increasing Pr content and Fe content, respectively. The largest magnetostriction at room temperature was found in the alloy R{sub 0.7}Pr{sub 0.3}Fe{sub 1.55} (1480{times}10{sup {minus}6} at {ital H}=796 kA/m). {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 397397
• Journal Information: Applied Physics Letters, Vol. 69, Issue 22; Other Information: PBD: Nov 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DYSPROSIUM ALLOYS
MAGNETOSTRICTION
TERBIUM ALLOYS
PRASEODYMIUM ALLOYS
IRON ALLOYS
MICROSTRUCTURE
CURIE POINT
PHASE STUDIES
LATTICE PARAMETERS
X-RAY DIFFRACTION
XRD