Magnetic properties of hexagonal closed-packed iron deduced from direct observations in a diamond anvil cell

被引：24

作者：

Gilder, S

Glen, J

机构：

[1] Inst Phys Globe, Lab Paleomagnetisme, F-75252 Paris 05, France

[2] Berkeley Gerontol Ctr, Berkeley, CA 94709 USA

[3] Univ Calif Santa Cruz, Inst Tecton, Santa Cruz, CA 95064 USA

[4] Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA

来源：

SCIENCE | 1998年 / 279卷 / 5347期

关键词：

D O I：

10.1126/science.279.5347.72

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The attraction of hexagonal closed packed (hcp) iron to a magnet at 16.9 gigapascals and 261 degrees centigrade suggests that hcp iron is either paramagnetic or ferromagnetic with susceptibilities from 0.15 to 0.001 and magnetizations from 1800 to 15 amperes per meter, If dominant in Earth's inner core, paramagnetic hcp iron could stabilize the geodynamo.

引用

页码：72 / 74

页数：3

共 42 条

[1] SPECTROSCOPY AT VERY HIGH-PRESSURES .10. USE OF RUBY R-LINES IN ESTIMATION OF PRESSURE AT AMBIENT AND AT LOW-TEMPERATURES [J].

ADAMS, DM ;

APPLEBY, R ;

SHARMA, SK .

JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1976, 9 (12) :1140-1144

[2]

AKIMOTO S, 1987, HIGH PRESSURE RES MI, V39, P149

[3] PROPERTIES OF IRON AT THE EARTHS CORE CONDITIONS [J].

ANDERSON, OL .

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 84 (03) :561-579

[4] STABILITY OF THE BODY-CENTERED CUBIC PHASE OF IRON - A THERMODYNAMIC ANALYSIS [J].

BASSETT, WA ;

WEATHERS, MS .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1990, 95 (B13) :21709-21711

[5] THE PHASE-DIAGRAM OF IRON TO 430-KBAR [J].

BOEHLER, R .

GEOPHYSICAL RESEARCH LETTERS, 1986, 13 (11) :1153-1156

[6] PHASE-TRANSITIONS, GRUNEISEN-PARAMETER, AND ELASTICITY FOR SHOCKED IRON BETWEEN 77-GPA AND 400-GPA [J].

BROWN, JM ;

MCQUEEN, RG .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1986, 91 (B7) :7485-7494

[7] INNER-CORE ANISOTROPY, ANOMALIES IN THE TIME-AVERAGED PALEOMAGNETIC FIELD, AND POLARITY TRANSITION PATHS [J].

CLEMENT, BM ;

STIXRUDE, L .

EARTH AND PLANETARY SCIENCE LETTERS, 1995, 130 (1-4) :75-85

[8] MAGNETIC SUSCEPTIBILITY AND LOW-TEMPERATURE SPECIFIC HEAT OF HIGH-PURITY TITANIUM [J].

COLLINGS, EW ;

HO, JC .

PHYSICAL REVIEW B, 1970, 2 (02) :235-&

[9]

Collinson D.W., 1983, METHODS ROCK MAGNETI

[10] SEARCH FOR MAGNETISM IN HCP EPSILON-FE [J].

CORT, G ;

TAYLOR, RD ;

WILLIS, JO .

JOURNAL OF APPLIED PHYSICS, 1982, 53 (03) :2064-2065

← 1 2 3 4 5 →