1

2365 GPa4000~8000 K135GPa, 3500K365GPa,4000~8000K

3(Innermost inner core)Laske and Masters (1999)

:4

Labrosse et al. (Nature, 2007)Murakami and Bass (PRL, 2010), Ohtani (PEPI, 1983), Ohtani and Maeda (EPSL, 2000)5

INTRODUCTIONSano, Ohtani et al. (2008), GRL6

27

150GPa NaCl-B2 MgO5000 K @300 GPa

A diamond anvil compressed at 374 GPa and 300 KAsanuma et al. AIRAPT (2009)8

(ED-MS) (SP-8)SP89

100~350 GPa, 2000 KAlfred BaronSP8SP8-BL3510

11

150GPa,1500 K)150GPaJay Bass12

213

:150 GPaSPring8, BL10XUSP8200GPaFe2O3Jay Bass151GPaAlfred BaronSPring8, BL352

44A1

A2(S) X:151 GPa

200 GPa

150GPa

A3

A31. 5000 K @300 GPa

2.(Fe) (ED-MS): ED-MS

3100~350 GPa150 GPa, 1500 K): ~100 GPa30GPa, 1500 K

XRD (BL10XU) a) : 135 GPa, 3000 K (Hirao et al., 2006; Sakai et al., 2007) b) 254 GPa, 3500 K (Asanuma et al., 2008): FeSiFeNiSiFe3S(FeNi)3SFeHx c) 376 GPa, 700 K(Asanuma et al., 2009)

2. 150 GPa

3. -MS()135 GPa: Fe3+3 (BL11XU)

4. IXSFeNiSi @151 GPa (BL35XU)A4

A5

Typical X-ray diffraction profile for Fe-9.8 wt% Ni-4.0 wt% Si under high pressures at ambient temperatureA6The hcp phase is stable at the pressure of the center of the Earth300KA diamond anvil compressed at 374 GPa and 300 KAsanuma et al. (2009, AIRAPT)Diffraction patterns of Fe0.83Ni0.09Si0.08(Fe-9.8wt%Ni-4wt%Si) at 300 K

57FeXMitsui et al. (2007) JJAP, 46, L930.57Fe-XSmirnov et al. (1997) Phys. Rev. B 55, 5811.Mitsui et al. (2007) Jpn. J. Appl. Phys. 46, L821.E~neV57FeBO3@ ~ Neel temp. External magnetic fieldA7

BL10XUXRD57Fe-MSXXRDMS X1030 min.!? BL10XU etc.XDAC (IP/CCD)XRDIN OUT 14.4 keV(43.2 keV)@BL10XUA8

SPring-8 BL10XUXRD57Fe-MSSR

SR+XA9

57Fe100Energy-domain SR Mssbauer SpectroscopyNuclear Forward Scattering: NFS (Time-domain)DACRadioactive Isotope Mssbauer SpectroscopyA10

57Fe300 GPaGdFe2@302 GPa (Mitsui, Hirao et al. (2009) JSR)A11

High-pressure Brillouin scattering using DACDiamond Anvil Cell (DAC) apparatusAr laser (514.5nm)6-pass tandem Fabry-Perot interferometer

High-pressure Brillouin scattering systemA12

Combined system for simultaneous measurementsBrillouin scattering + XRD + Laser heatingMurakami et al., PEPI, 2009A13

*FeBO3(333)

11XU09XU11XU

------

BL11XU

1 deg. = 60 min. = 3600 sec.1/60 deg. = 1 min. = 60 sec.1/3600 deg. = 1 sec.