Slides

More documents

Recommendations

Info

High spin – low spin transition in heme molecule with O 2 - cycling Heme protein..... Fe ++ .....is magnetic 3d 6 state w/o O 2 – binding deoxy with O 2 – binding oxy H. Zabel 3. Lecture: Local Moments 24
Consequences from a strong crystal field If crystal field has low symmetry, the degeneracy is lifted and the time average yields zero orbital moment: L z = 0 The ground state is characterized by an s-character and (2S+1)- degeneracy. = S and L The saturation magnetization is then: J Magnetization measurements yield directly S, the maximum S value in the d-shell is S=5/2 with m = 5µ B (i.e. Cr + (3d 5 4s 0 ) and Mn 2+ (3d 5 4s 0 )). = 0 N N M S = gSµ BS = µ B 2S V V H. Zabel 3. Lecture: Local Moments 25
Page 1 and 2: 3. Lecture: Basics of Magnetism: Lo
Page 3 and 4: 1. Local moments of magnetic ions O
Page 5 and 6: Nomenclature for spectroscopic term
Page 7 and 8: Overview of 3d-metal ions m L = H.
Page 9 and 10: L and S according to Hund‘s Rule
Page 11 and 12: Calculated effective magnetic momen
Page 13 and 14: Magnetic moments of 3d-transition m
Page 15 and 16: Crystal electrical field splitting
Page 17 and 18: Octahedral crystal field Max. proba
Page 19 and 20: Adding all energy terms + H CF λL
Page 21 and 22: Degeneracies in crystal fields p-le
Page 23: High spin - low spin case • For d
Page 27 and 28: 6. Magnetic moment of rare earth io
Page 29 and 30: Overview of 4f-rare earth ions m L
Page 31 and 32: Example: Ce 3+ (one electron in the
Page 33 and 34: Comparison of calculated and measur
Page 35 and 36: LS splitting for Sm LS -splitting Z

Slides

Create successful ePaper yourself

Delete template?

Save as template?