Magnetic and magneto-optical properties of Mn5(Ge 1-xMx)3 alloys with M=Sn, Pb

Y. Zhang, A. P. Runge, Z. S. Shan, D. J. Sellmyer

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We report on the magnetic and magneto-optical properties of the intermetallic alloys Mn5(Ge1-xMx)3, where M=Sn, Pb. Generally, these alloys were ordered ferromagnetically at T≥300 K for x<0.3. The structure of Mn5(Ge1-xSn x)3 remains in the hexagonal Mn5Si 3(hP16) phase up to x=0.25 and then changes to Ni2In (hP6) as x approaches 1. The magnetization and Curie temperature of these alloys is largest for small x and reach a minimum value near x=0.5. The room temperature Polar Kerr rotation, however, increases from -0.06°at x=0 to maximum value of -0.12°at x=0.1 before decreasing toward zero for x≳0.3. The Mn 5(Ge1-xPbx)3 samples show a Mn 5Si3 structure with ferromagnetic behavior for x≤0.3, and varying structure with rapidly decreasing magnetization above x=0.3. The magnetic behavior observed was complex for x≥0.3. The Kerr rotation of the Pb-doped alloys in the ferromagnetic region monotonically decreases from -0.06°to zero at x≊0.3.

Original languageEnglish (US)
Pages (from-to)6354-6356
Number of pages3
JournalJournal of Applied Physics
Issue number10
StatePublished - Dec 1 1994


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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