TY - JOUR

T1 - Nearly ferromagnetic properties of CrGe1-xSix (0⪕x⪕0.15)

AU - Sato, T.

AU - Ohta, E.

AU - Sakata, M.

N1 - Funding Information:
The authors wish to thank Professor S. Anzai of Keio University, and Dr. I. Kawasumi of Kyorin University for many stimulating discussions. This work was partly supported under a grant in-aid for Scientific Research from the Ministry of Education, Science and Culture.

PY - 1986/9

Y1 - 1986/9

N2 - The magnetic susceptibility χ and the electrical resistivity ρ{variant} of CrGe1-xSix (0{slanted equal to or less-than}x{slanted equal to or less-than}0.15) are measured in the temperature ranges of 4.2-420 K and 4.2-300 K, respectively. The magnetic susceptibility at high temperatures satisfies the Curie-Weiss type relation: χ = C (T-Θp), where C(≈0.5 emu K mol) is roughly constant independent of Si content and Θp decreases from -376 to -462 K with increasing Si content. A maximum or a trace of the maximum is observed around Tmax in χ for 0{slanted equal to or less-than}x{slanted equal to or less-than}0.15, and this anomalous behaviour becomes indistinct and Tmax increases with increasing Si content. The electrical resistivity has a T2 dependence with large coefficients A (6.3x10-9-10.5x10-9 Ω cm{plus 45 degree rule}K2) at low temperatures, and the tendency for saturation is observed in the ρ{variant}-T curve at high temperatures. These behaviours are discussed in terms of the spin fluctuation theory for nearly ferromagnetic metals. We conclude that CrGe1-xSix (0{slanted equal to or less-than}x{slanted equal to or less-than}0.15) is a nearly ferromagnetic metal and the degree of electron correlation decreases systematically with increasing x.

AB - The magnetic susceptibility χ and the electrical resistivity ρ{variant} of CrGe1-xSix (0{slanted equal to or less-than}x{slanted equal to or less-than}0.15) are measured in the temperature ranges of 4.2-420 K and 4.2-300 K, respectively. The magnetic susceptibility at high temperatures satisfies the Curie-Weiss type relation: χ = C (T-Θp), where C(≈0.5 emu K mol) is roughly constant independent of Si content and Θp decreases from -376 to -462 K with increasing Si content. A maximum or a trace of the maximum is observed around Tmax in χ for 0{slanted equal to or less-than}x{slanted equal to or less-than}0.15, and this anomalous behaviour becomes indistinct and Tmax increases with increasing Si content. The electrical resistivity has a T2 dependence with large coefficients A (6.3x10-9-10.5x10-9 Ω cm{plus 45 degree rule}K2) at low temperatures, and the tendency for saturation is observed in the ρ{variant}-T curve at high temperatures. These behaviours are discussed in terms of the spin fluctuation theory for nearly ferromagnetic metals. We conclude that CrGe1-xSix (0{slanted equal to or less-than}x{slanted equal to or less-than}0.15) is a nearly ferromagnetic metal and the degree of electron correlation decreases systematically with increasing x.

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U2 - 10.1016/0304-8853(86)90085-5

DO - 10.1016/0304-8853(86)90085-5

M3 - Article

AN - SCOPUS:0022785620

SN - 0304-8853

VL - 61

SP - 205

EP - 211

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

ER -