Spin Reorientation Studies in Nd_2Fe_{14-x}Si_xB (0

• Authors: R. Gargula , A. Pędziwiatr , B. Bogacz , S. Wróbel , J. Bartolomé , J. Stankiewicz
• Languages of publication: EN

Abstracts

EN

Nd_2Fe_{14-x}Si_xB (x=0.25, 0.5, 0.75, 1.0, 1.5, 2.0) intermetallic compounds were investigated by magnetometry, ^{57}Fe Mössbauer effect, electric resistivity, and differential scanning calorimetry mainly in the vicinity of the spin reorientation temperature, T_{SR}. The Curie temperature, T_C, and T_{SR} were determined for different compositions and the spin phase diagram was constructed. ^{57}Fe Mössbauer spectra showed noticeable changes in the reorientation region. For temperatures above the transition, the spectra were analysed using 6 Zeeman patterns associated with 6 inequivalent crystal sites in Nd_2Fe_{14}B according to site occupations (16k_1:16k_2:8j_1:8j_2:4c:4e). In the transition region, 12 subspectra had to be incorporated in the analysis. Electric resistivity measurements showed a typical metallic behaviour with no anomalies in the magnetic transition region. Differential scanning calorimetry measurements revealed broad endothermic two stage peaks around T_{SR}.

Keywords

EN

75.50.Ww; 76.80.+y; 64.60.-i

Discipline

• 76.80.+y: Mössbauer effect; other γ-ray spectroscopy(see also 33.45.+x Mössbauer spectra—in atomic and molecular physics; for biophysical applications, see 87.64.kx; for chemical analysis applications, see 82.80.Ej)
• 64.60.-i: General studies of phase transitions(see also 63.70.+h Statistical mechanics of lattice vibrations and displacive phase transitions; for critical phenomena in solid surfaces and interfaces, and in magnetism, see 68.35.Rh, and 75.40.-s, respectively)
• 75.50.Ww: Permanent magnets(for magnets, see 07.55.Db in instruments)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 101
• Issue: 2
• Pages: 289-294

Dates

published

2002-02

received

2001-11-02

Contributors

author

R. Gargula

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

A. Pędziwiatr

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

B. Bogacz

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

S. Wróbel

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

J. Bartolomé

• Faculty of Science, University of Zaragoza - CSIC, 50009 Zaragoza, Spain

author

J. Stankiewicz

• Faculty of Science, University of Zaragoza - CSIC, 50009 Zaragoza, Spain

References

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Identifiers

DOI

10.12693/APhysPolA.101.289