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The saturation magnetization Mmax of the ferromagnetic metal nickel is4.70×105A/m . Calculate the magnetic dipole moment of a single nickel atom. (The density of nickel is8.90g/cm3, and its molar mass is58.71g/mol .)

Short Answer

Expert verified

Magnetic dipole moment of a single nickel atom is, μB=5.15×10-24Am2.

Step by step solution

01

Listing the given quantities

Saturation magnetization Mmax=4.70×105A/m

Density of nickel isÒÏ=8.90g/cm3

Molar mass of nickel is 58.71g/mole

02

Understanding the concepts of magnetic dipole moment

We use the concept of magnetic dipole moment. Using the equations, we findthenumber of atoms per unit volume, and then we can findthemagnetic dipole moment.

Formulae:

μB=Mmaxn

n=ÒÏNAM

03

Calculations of the magnetic dipole moment of a single nickel atom

We find the number of atoms per unit volume.

Using equation

n=ÒÏNAM=(8.90)(6.023×1023)58.71=9.126×1022atomscm3

We can convert it in atoms/m3 .We can write

n=9.126×1022atomscm3×1cm10-2m3=9.126×1022atomscm3×1cm310-6m3=9.126×1028atomsm3

Substituting this value in magnetic dipole moment,

μB=Mmaxn=4.70×1059.126×1028=5.15×10-24Am2

Magnetic dipole moment of a single nickel atom is, μB=5.15×10-24Am2.

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