Unusual magnetic behavior in Gd{sub 5}(Si{sub 1.5}Ge{sub 2.5}) and Gd{sub 5}(Si{sub 2}Ge{sub 2})
Journal Article
·
· Physical Review B
The coexistence of ferromagnetic and paramagnetic phases in the 4f-electron systems Gd{sub 5}(Si{sub 1.5}Ge{sub 2.5}) and Gd{sub 5}(Si{sub 2}Ge{sub 2}) during the magnetic-martensitic phase transition have been observed. A dc magnetic field reversibly changes both the magnetic and crystal structures of the alloys above their respective Curie temperatures. A negative imaginary component of the ac magnetic susceptibility for both alloys has been observed in the ferromagnetic state. The results are discussed in terms of indirect Ruderman-Kittel-Kasuya-Yosida and direct superexchange interactions, and anomalies of the relaxation process.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205665
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 22 Vol. 62; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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