Neutron Scattering from Magnetic Materials part 1 pps

... 9 5.2.Coherentandincoherentscattering 11 6.Magneticneutronscattering 12 6 .1. Scattering of neutrons from unpaired electrons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.2. Scattering of neutrons from ... =E 0 −E 1 =E λ 1 −E λ 0 , ( 21) we get  d 2 σ dΩ dE  k 0 ,σ 0 ,λ 0 →k 1 ,σ 1 λ 1 = 1 N k 1 k 0  m 2π ¯ h 2  2   k 1 σ 1 λ 1 |V |k...

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... 0.000 f 8 (Tb 3+ ) 3 3 6 0.333 f 9 (Dy 3+ )55/ 215 /2 0.500 f 10 (Ho 3+ ) 6 2 8 0.600 f 11 (Er 3+ )63/ 215 /2 0.667 f 12 (Tm 3+ ) 5 1 6 0. 714 f 13 (Yb 3+ ) 31/ 27/2 0.750 Fig. 12 . The form factor of Sm measured ... approximation f   Q  =  j 0 (Q)  +c 2  j 2 (Q)  (95) with c 2 = 2 g J 1 = J(J +1) +L(L +1) −S(S +1) 3J(J +1) −L(L +1) +S(S +1) . (96) Table 1 displays th...

Ngày tải lên: 12/08/2014, 02:23

... CONTINUE CST (1, 1)=C (1, 1)*CC+C(2,2)*SS+(C(2 ,1) -C (1, 2))*SCI CST (1, 2)=C (1, 2)*CC+C(2 ,1) *SS+(C(2,2)-C (1, 1))*SCI CST(2 ,1) =C(2 ,1) *CC+C (1, 2)*SS+(C (1, 1)-C(2,2))*SCI CST(2,2)=C(2,2)*CC+C (1, 1)*SS+(C (1, 2)-C(2 ,1) )*SCI CST (1, 3)=C (1, 3)*CC+C(2,4)*SS+(C(2,3)-C (1, 4))*SCI CST (1, 4)=C (1, 4)*CC+C(2,3)*SS+(C(2,4)-C (1, 3))*SCI CST(2,3)=C(2,3)*CC+C (1, 4)*SS+(C (1, 3)-C(2,4))*S...

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... (0, 0, 1) ∗ ( 1 2 , 1 2 , 0) F (0, 0, 1) ( 1 2 , 1 2 , 1 2 ) Hexagonal P (0, 0, 1 2 ) ∗ ( 1 2 , 0, 0)( 1 2 , 0, 1 2 ) R (0, 0, 1 2 )( 1 2 , 1 2 , 0)( 1 2 , 1 2 , 1 2 ) ∗ Tetragonal P (0, 0, 1 2 ) ∗ ( 1 2 , ... 0, 1 2 ) ∗ ( 1 2 , 0, 0)( 1 2 , 1 2 , 0) ∗ ( 1 2 , 0, 1 2 )( 1 2 , 1 2 , 1 2 ) ∗ I (c > a) (0, 0, 1) ∗ ( 1 2 , 1 2 , 0)(...

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... B  =  10 00  ⊗A +  00 01  ⊗B (15 a) and A ⊗B ≡   A 11 ··· A 1C A . . . . . . A L A 1 ··· A L A C A   ⊗   B 11 ··· B 1C B . . . . . . B L B 1 ··· B L B C B   =   A 11 [B] ··· A 1C A [B] . . . . . . A L A 1 [B] ... 511 (19 93). [11 0] Y. Moritomo, A. Asamitsu, H. Kuwahara, and Y. Tokura, Nature 380 14 1 (19 96). [11 1] Y. Tokura (Ed.), Colossal Magnetoresistive...

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... different, P(a) =  10 0 0 (cos 2 φ 1) / (1 +cos 2 φ) 2cosφ/ (1 +cos 2 φ) 0 2cosφ/ (1 +cos 2 φ) (1 −cos 2 φ)/ (1 +cos 2 φ)  , P(b) =  10 0 010 00 1  , P(c) =  10 0 0 10 0 01  . It is clear from these ... P.J. Brown, in: Neutron Scattering from Magnetic Materials, ed. T. Chatterji, Chap. 5, Elsevier (2005), this volume. [11 ] F. Tasset, J. Phys. IV 11 15 9 (20 0...

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... Phys.: Condens. Matter 3 42 81 (19 91) . [11 ] A. Dommann and F. Hullinger, J. Less-Common Met. 14 1 2 61 (19 88). [12 ] A. Dommann et al., J. Less-Common Met. 16 0 17 1 (19 90). [13 ] P.J. Brown, J.B. Forsyth ... B.M. Wanklyn, J. Phys. C 21 2 917 (19 88). [8] D. Yablonski, Physica C 17 1 454 (19 90). [9] Yu.G. Raydugin, V.E. Naish and E.A. Turov, J. Magn. Magn. Mater. 10 2 3 31 (...

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... equations 2 ¯ hω q,0 =(a 1 +a 2 +b 1 −b 2 ) +2Ω(q), (49) 2 ¯ hω q ,1 =−(a 1 +a 2 +b 1 −b 2 ) +2Ω(q), (50) where 2Ω(q) =  (a 1 −a 2 +b 1 +b 2 ) 2 −S 1 S 2  4J (q)  2  1/ 2 , ( 51) a 1 =g 1 µ B H, (52) a 2 =g 2 µ B H, ... written as ¯ hω q,a −J (0)(S 2 −S 1 )( 1) a +   J (0)(S 1 −S 2 )  2 − 16 3 S 1 S 2 q 2 J (0)J (2)  J (0)(S 1 −S 2 )  1 +( 1) a +1...

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... 0.97(4) 1. 02(5) ν  1. 00 – – – – 1. 12 (13 ) γ 1. 75 1. 34(22) 1. 67(9) – 1. 71( 4) 1. 73(5) γ  1. 75 – – – – 1. 92(20) η 0.25 – 0.2 (1) – – – β 0 .12 5 0 .11 9(8) 0 .11 5 (16 ) 0 .11 4(4) 0 .12 3(8) – 4. Magnetic correlations ... 1. 06 La 0.7 Pb 0.3 MnO 3 355 13 3.7 35 [10 0] 4.37 1. 14 La 1. 2 Sr 1. 8 Mn 2 O 7 12 8 16 9 37 [10 0] 15 .33.35 [10 0] Ni 6 31 550 350 10...

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... |r| 2 from a value of r calculated using (24), Polarized neutron reflectometry 413 where µ is the magnitude of the neutron magnetic moment (µ = 1. 913 nuclear mag- netons or 1. 913 × 5.0 51 10 −27 J/T) ... . . . . . . . . . . . . . 413 3.3.Polarization 415 3.4.Selectinganeutronpolarizationstate 417 3.5.Changinganeutron’spolarization 417 NEUTRON SCATTERING FROM MAGNETIC M...

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