Effects of Co2+ and Mn3+ ion substitutions on the anisotropy and magnetostriction constants of Y3Fe5O12

Abstract The results of room-temperature measurements of the magnetocrystalline anisotropy constants K 1 and K 2 are reported together with values of the magnetostriction constants λ 100 and λ 111 for single crystals of Y 3 Fe 5−2x Co x Si x O 12 , with x = 0, 0.007, and 0.028. As in the case of Co 2+ - Ge 4+ and Ru 4+ - Ca 2+ substitutions, K 1 becomes positive and K 2 more negative with increasing x. Significantly, λ 100 and λ 111 remain relatively unaffected by the presence of Co 2+ ions, in accord with the findings for Li 0.5 Fe 2.5 O 4 . Comparison is made with the Y 3 Fe 5−y Mn y O 12 system, and the ability to vary magnetostriction and anisotropy constants relatively independently by Mn 3+ or Co 2+ ion substitutions is explained.

[1]  G. Dionne.  Conditions for stress-induced uniaxial anisotropy in magnetic materials of cubic symmetry☆ , 1971 .

[2]  S. Iida,et al.  Ferromagnetic Resonance in Garnet Y 3 Fe 5− x Co x ⁄2 Ge x ⁄2 O 12 , 1963 .

[3]  G. P. Rodrigue,et al.  Resonance Measurements in Magnetic Garnets , 1960 .

[4]  G. Dionne.  Magnetic‐Anisotropy and Magnetostriction Constants of Substituted Lithium Ferrites at 300°K , 1969 .

[5]  H. J. Hagger,et al.  Microwave Ferrites And Ferrimagnetics , 1962 .

[6]  Gerald F. Dionne,et al.  Molecular Field Coefficients of Substituted Yttrium Iron Garnets , 1970 .

[7]  A. B. Smith,et al.  A Ferromagnetic Resonance Method of Measuring Magnetostriction Constants , 1968 .

[8]  Gerald F. Dionne.  Elimination of stress effects on remanence ratios of cubic magnetic materials , 1971 .

[9]  T. Mcguire,et al.  Garnet compositions for bubble domain systems utilizing stress-induced uniaxial anisotropy , 1971 .

[10]  N. Menyuk,et al.  Further Development of the Vibrating‐Coil Magnetometer , 1958 .

[11]  J. Goodenough.  Spin-orbit-coupling effects in transition-metal compounds , 1968 .

[12]  S. Iida.  Magnetostriction Constants of Rare Earth Iron Garnets , 1967 .

[13]  Gerald F. Dionne,et al.  Ferrimagnetic Resonance Measurement of the λ111 Magnetostriction Constant with the Magnetic Field Along a 〈111〉 Axis , 1970 .

[14]  P. Hansen.  Contribution of Some 4d and 5d Transition-Metal Ions on Octahedral Sites to the Anisotropy of Ferrites and Garnets , 1971 .

[15]  J. P. Remeika,et al.  Magnetic Behavior of Cobalt in Garnets. II. Magnetocrystalline Anisotropy and Ferrimagnetic Resonance of Cobalt-Doped Yttrium Iron Garnet , 1969 .

[16]  L. Bickford.  Ferromagnetic Resonance Absorption in Magnetite Single Crystals , 1950 .

[17]  R. Sroussi,et al.  Some interesting properties of polycrystalline garnets containing Co 2+ ions , 1970 .