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Pertemuan 13 FISIKA ZAT PADAT SPIN PARAMAGNETIK Iwan Sugihartono, M.Si Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam
OUTLINE ,[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta   |  www.unj.ac.id  |
Electromagnetism ,[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
What is a Field? ,[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Gravitational Field ,[object Object],A = acceleration G = gravitational constant  m = mass of big object r = distance to the center  of the big object 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Electric Field ,[object Object],[object Object],E = Electric Field F = Electric Force q = Charge  E is measure in Force/Coulomb 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Magnetic Field ,[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
[object Object],A simple formula to calculate Magnetic Field B =  magnetic field F =  Magnetic Force Q =  charge V = velocity of the moving charge 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
[object Object],[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Right Hand Rule 1 ,[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Right Hand Rule 2 ,[object Object],[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Magnetism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Remember SPDF?? (Chem 11) ,[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Nitrogen -Electrons -Protons and Neutrons 1s2 2p3 Electron  Configuration  of  Nitrogen Wrong Wrong 2s2 Right 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
There are four types of magnetism ,[object Object],[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Magnetism is Measure in Magnetic Susceptibility ( χ m)   The more susceptibility  of a material has,  the more magnetic property  it processes 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  | Material Susceptibility  χ m Vacuum 0 Water -1.2*10 -5   Bi -16.6*10 -5 C -2.1*10 -5 O2 0.19*10 -5 Al 2.2*10 -5 Fe 200  Co 70  Ni 110
Ferromagnetic ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Iron electron configuration Fe: 1s2,2s2,2p6,3s2,3p6,4s2,3d6   Fe: [Ar],4s2,3d6   Ar: 1s2,2s2,2p6,3s2,3p6 = [Ar]  “ Core ” [Ar] -The electrons seems to align spontaneously -Pure quantum mechanics effect   15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Why are some Ferromagnetic doesn’t attract one another? ,[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Paramagnetic ,[object Object],[object Object],[object Object],Aluminum Al Susceptibility =  2.2*10-5 Platinum Pt 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Aluminum electron configuration [ Ne ]. 3s 2. 3p 1  Compare to Iron (Fe) [Ar] Fe: [Ar],4s2,3d6 the dipoles do not interact with one another and are randomly oriented in  the absence of an external field due to thermal agitation,  resulting in zero net magnetic moment   What is the differences between the two?! 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Diamagnetic ,[object Object],[object Object],[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Diamagnetism ,[object Object],Gold Copper Human (mostly) 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Applications of Magnetism MRI (magnetic resonance images) Superconductors 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
Applications of Magnetism ,[object Object],15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |
THANK YOU 15/03/11 ©  2010 Universitas Negeri Jakarta  |  www.unj.ac.id  |

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12 -14 c-spin_paramagnetism

  • 1. Pertemuan 13 FISIKA ZAT PADAT SPIN PARAMAGNETIK Iwan Sugihartono, M.Si Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam
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  • 6. 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 8. 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 14. 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 17. Nitrogen -Electrons -Protons and Neutrons 1s2 2p3 Electron Configuration of Nitrogen Wrong Wrong 2s2 Right 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 19. Magnetism is Measure in Magnetic Susceptibility ( χ m) The more susceptibility of a material has, the more magnetic property it processes 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id | Material Susceptibility χ m Vacuum 0 Water -1.2*10 -5 Bi -16.6*10 -5 C -2.1*10 -5 O2 0.19*10 -5 Al 2.2*10 -5 Fe 200 Co 70 Ni 110
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  • 21. Iron electron configuration Fe: 1s2,2s2,2p6,3s2,3p6,4s2,3d6 Fe: [Ar],4s2,3d6 Ar: 1s2,2s2,2p6,3s2,3p6 = [Ar] “ Core ” [Ar] -The electrons seems to align spontaneously -Pure quantum mechanics effect 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 24. Aluminum electron configuration [ Ne ]. 3s 2. 3p 1 Compare to Iron (Fe) [Ar] Fe: [Ar],4s2,3d6 the dipoles do not interact with one another and are randomly oriented in the absence of an external field due to thermal agitation, resulting in zero net magnetic moment What is the differences between the two?! 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 27. Applications of Magnetism MRI (magnetic resonance images) Superconductors 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
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  • 29. THANK YOU 15/03/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |