C 3 C-1 Cu 2 (OH) 3 Cl A, B A, A, A, B, B Cu 2 (OH) 3 Cl clinoatacamite S=1/2 Heisenberg Cu 2+ T N 1 =18K T N 2 =6.5K SR T N 2 T N 1 T N 1 0T 1T 2T 3T 4T 5T 6T C (J/K mol) 20 18 16 14 12 10 8 6 0 0 5 10 15 20 25 4 5 10 15 20 25 30 T (K) 12 10 8 6 4 2 20
C-2 2b 3CuCl 2 2H 2 O A, B, C A, A, A, A, B, B, C, C ( ) 2b 3CuCl 2 2H 2 O Cu 2+ (S = 1/2) 2b 3CuCl 2 2H 2 O B = 0T C mag (T ) 1.3K 5.5K C-3 CuMoO 4 A, B, CERC C A, A, A, A, B, B, C (CuMoO 4 ) ( ) CuMoO 4 200K 1.75K CuMoO 4 4.2K 20T ( 50T) 1/3 21
C-4 [Cu(bpym)(tcnoet) 2 ] H 2 O A, B A, B, B, B, B [Cu(bpym)(tcnoet) 2 ] H 2 O Cu 2+ (S=1/2) 30K [Cu(bpym)(tcnoet) 2 ] H 2 O X (χ m ) (T ) ( 28.5K) 4K C-5 A, B B A, B, B, B, ( ) Ni 3 (µ 1,3 -N 3 ) 3 Ni 2+ (S=1) S=1 Ni 3 (µ 1,3 -N 3 ) 3 X [Ni 3 (µ 1,3 -N 3 ) 3 (2,2 -bpy) 3 ](ClO 4 ) 3 3H 2 O (χ) 40K S=1 22
C-6 Mn A, B A, B, B MnFeP 1 x Ge x Ge Si MnFeP 1 x Si x 0.28 x 0.64 Fe 2 P x=0.4,0.5-1100 650 50 D. T. Cam Thanh etal., J. Appl. Phys. 103, 07B318 (2008) C-7 A, B A, B, B MnFeP 0.8 Ge 0.2 MnFeP 0.8 Ge 0.2 M. Yue et al., J. Appl. Phys. 107, 09A939 (2010) 23
C-8 DMACuCl 3 II A, B, RIKEN C A, A, A, A, B, C DMACuCl 3 ( DMA = (CH 3 ) 2 NH 2 ) 2T < H < 3.5T (powder) [1] (ball mills powder) 1 [1] Y.Yoshida,et al., J.Phys.Soc.Jpn.Vol.74(2005)2917. T (K) 2.0 1.5 1.0 0.5 single crystal powder ball mills powder 0.0 0 1 2 3 4 5 6 7 8 H (T) 図 1, 温度 - 磁場相図 C-9 30GPa A A, A, A, A DAC SQUID DAC GPa H=5 T T=1.8 400 K XMCD P= 25 GPa CoFe 2 O 4 Magnetic moment [emu] 0.004 0.003 0.002 0.001 2 T 5 T T = 293 K 0 0 5 10 15 20 25 30 Pressure [GPa] 図 1.CoFe 2 O 4 の磁化の圧力依存性 24
C-10 (C 5 H 12 N) 2 CuBr 2 Cl 2 NMR A, B A, B A, A, A, A, (C 5 H 12 N) 2 CuBr 4 Br T LL Br (C 5 H 12 N) 2 CuBr 2 Cl BrCl 2 H C1 1 H NMR BrCl H C1 = 2.3T Br T LL BrCl Cu 2+ Zn 2+ 1/T 1 H= 1.2T <H C1 H= 3.5T >H C1 T 1 1/T 1 1/T 1 T LL C-11 Ru2-xFexCrSi(x 1) A A, A, A, A Ru 2 x Fe x CrSi Fe-rich Ru-rich Ru 1.9 Fe 0.1 CrSi Ru 2 x Fe x CrSi x = 0, 0.005, 0.01 0.005T 5T Y x = 0.1 T f1 T f2 x = 0.1 T f1 x = 0.1 T f2 2 x = 0 0.008 0.004 0.000 0 10 20 30 40 50 60 25
C-13 A, B A, A, A, B, A, A 30 P = 0.8 GPa Meier - - [1] SBA-15( 8 nm) PCC P = 1.5 GPa (DAC) SBA-15 DAC PCC 0.02 % ( φ0.2mm) SBA 15 10 8 10 9 emu [1] R. J. Meier et al., J. Phys. C : Solid State Phys. 15 (1982) 1015. C-14 γ-fe 2 O 3 A, B, C, D A, A, A, B, A, A, A.Cabot C, N.J.O.Silva D γ Fe 2 O 3 γ Fe 2 O 3 ( ) [1] γ Fe 2 O 3 1 γ Fe 2 O 3 ( 5.1 nm)[1] γ Fe 2 O 3 ( 9.5 nm) P 4 kbar [1]Y. Komorida, et al., J. Mag. Mag. Mater. 322 (2010) 2117 E/k B [K] 2400 2200 2000 1800 1600 1400 1200 通常型 γ-fe 2 O 3 ナノ粒子 中空型 γ-fe 2 O 3 ナノ粒子 550 500 450 400 350 1000 300 0 5 10 15 P [kbar] 図 1 通常型 γ-fe O ナノ粒子 ( 粒径 5.1 nm) の 2 3 活性化エネルギー ( 挿入図 ) [1] と中空型 γ-fe 2 O 3 ナノ粒子 ( 粒外径 9.5 nm) の 活性化エネルギーの圧力依存性 E/k B [K] 26
C-15 A, B A, A, A, A, A, A, B 1 MHz 1 GHz ( f res = 1 MHz 868 MHz (f 3.2 GHz, V 14.5 dbm GHz V 25 dbm C-16 SQUID A, ( ) B A, A, B A, A, A, SQUID(Superconducting Quantum Interference Devices) MPMS ( 24bit 200kHz A/D ) 1kHz 14kHz 10kHz 90 Pb 27
C-17 NiO A, B A, A, A, B, A, A, B NiO [1] 1 NiO (D =2.6nm, 11.4 nm) 5K [1] R.H.Kodama et al., P hys.rev.lett. 79 (1997) 1393. H (koe) c 6 5 D = 2.6 nm D = 11.4 nm 4 3 2 1 0 0 5 T (K) 10 15 図 1 NiO ナノ粒子 (D=2.6nm, 11.4nm) の保磁場の温度依存性 C-18 Ni 3 (OH) 2 (cis 1, 4 chdc) 2 (H 2 O) 4.2H 2 O A, Uni. of Strasbourg B A, A, A, A, A, A, A, Mohamed Kurmoo B Ni cis-1,4- O2 NO χt [emu K/mol] 80 70 60 50 40 30 20 10 Field (T) 0 1 2 3 4 5 6 5 T=5K Ni-cis-chdc-M-H-5K Virgin Dehydrated O2 Removed Ni-cis-chdc-χT-T-100G H=100G 0 0 5 10 15 20 25 30 35 Temperature (K) 4 3 2 1 0 Magnetization(Nμ B ) 28
C-19 Ni 2 (H 2 O) 2 C 10 H 2 O 8.2H 2 O A, Uni. of Strasbourg B A, A, A, A, A, A, A, MohamedKurmoo B 1 2 SQUID Virgin T 29