期刊
PHYSICAL REVIEW B
卷 62, 期 22, 页码 14625-14628出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.62.R14625
关键词
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The coexistence of ferromagnetic: and paramagnetic phases in the 4f-electron systems Gd-5(S1.5Ge2.5) and Gd-5(Si2Ge2) during the magnetic-martensitic phase transition have been observed. A de magnetic field reversibly changes both the magnetic and crystal structures of the alloys above their respective Curie temperatures. A negative imaginary component of the uc 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.
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