Origin of the giant magnetic moments of Fe impurities on and in Cs films

被引：52

作者：

Kwon, SK ^{[1
]}

Min, BI ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.84.3970

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have explored the origin of the observed giant magnetic moments (similar to 7 mu(B)) of Fe impurities on the surface and in the bulk of Cs films, using the relativistic local-spin-density-approximation method. We have found that Fe impurities in Cs behave differently from those in noble metals or in Pd. Whereas the induced spin polarization of Ca atoms is negligible, the Fe ion itself is a source of the giant magnetic moment. The 3d electrons of Fe in Ca are localized as the 4f electrons in ran-earth ions so that the orbital magnetic moment becomes as large as the spin magnetic moment. The calculated total magnetic moment M = 6.43 mu(B) is close to the experimentally observed value.

引用

页码：3970 / 3973

页数：4

共 17 条

[1] BAND THEORY AND MOTT INSULATORS - HUBBARD-U INSTEAD OF STONER-I [J].

ANISIMOV, VI ;

ZAANEN, J ;

ANDERSEN, OK .

PHYSICAL REVIEW B, 1991, 44 (03) :943-954

[2]

ASHCROFT NW, 1976, SOLID STATE PHYS, pCH31

[3] Mystery of the alkali metals: Giant moments of Fe and Co on and in Cs films [J].

Beckmann, H ;

Bergmann, G .

PHYSICAL REVIEW LETTERS, 1999, 83 (12) :2417-2420

[4]

BECKMANN H, 1999, PHYS REV FOCUS 0917, V4, P15

[5] MAGNETIC-BEHAVIOR OF FE ATOMS ON THE SURFACE OF PALLADIUM [J].

BERGMANN, G .

PHYSICAL REVIEW B, 1981, 23 (08) :3805-3815

[6] DILUTE FERROMAGNETIC ALLOYS [J].

CRANGLE, J ;

SCOTT, WR .

JOURNAL OF APPLIED PHYSICS, 1965, 36 (3P2) :921-&

[7] 2P X-RAY ABSORPTION OF 3D TRANSITION-METAL COMPOUNDS - AN ATOMIC MULTIPLET DESCRIPTION INCLUDING THE CRYSTAL-FIELD [J].

DEGROOT, FMF ;

FUGGLE, JC ;

THOLE, BT ;

SAWATZKY, GA .

PHYSICAL REVIEW B, 1990, 42 (09) :5459-5468

[8] EXPERIMENTAL AND THEORETICAL-STUDY OF THE MAGNETISM AND LOCAL LATTICE STRUCTURE OF D-IONS IN ALKALI-METAL HOSTS [J].

GROSS, KD ;

RIEGEL, D ;

ZELLER, R .

PHYSICAL REVIEW LETTERS, 1989, 63 (11) :1176-1179

[9] DENSITY-FUNCTIONAL THEORY AND STRONG-INTERACTIONS - ORBITAL ORDERING IN MOTT-HUBBARD INSULATORS [J].

LIECHTENSTEIN, AI ;

ANISIMOV, VI ;

ZAANEN, J .

PHYSICAL REVIEW B, 1995, 52 (08) :R5467-R5470

[10] FORMATION OF LOCAL MOMENTS ON IRON IN ALKALI-METAL HOSTS [J].

MCHENRY, ME ;

MACLAREN, JM ;

VVEDENSKY, DD ;

EBERHART, ME ;

PRUEITT, ML .

PHYSICAL REVIEW B, 1989, 40 (15) :10111-10115

← 1 2 →