Evidence for an antiferromagnetic transition in a zeolite-supported cubic lattice of F centers

被引：125

作者：

Srdanov, VI ^{[1
]}

Stucky, GD

Lippmaa, E

Engelhardt, G

机构：

[1] Univ Calif Santa Barbara, Dept Chem, Santa Barbara, CA 93106 USA

[2] Inst Chem Phys & Biophys, EE-0001 Tallinn, Estonia

[3] Univ Stuttgart, Inst Chem Technol 1, D-70550 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.80.2449

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evidence for a bcc lattice of F centers in sodium-electro-sodalite (SES), synthesized by exposing dehydrated sodalite to sodium vapor, is presented. A high electron spin density in SES produces isotropic contact shifts in nuclear magnetic resonance (NMR) spectra of the framework nuclei whose magnitude is a discrete function of local electron density. Strong exchange coupling between unpaired electrons gives rise to an antiferromagnetic phase transition in SES at T-N = 48 +/- 2 K, providing the first example of an s-electron antiferromagnet.

引用

页码：2449 / 2452

页数：4

共 24 条

[1] REASSESSMENT OF THE CONDUCTION-ELECTRON SPIN-RESONANCE OF ALKALI-METALS IN ZEOLITES [J].

ANDERSON, PA ;

EDWARDS, PP .

PHYSICAL REVIEW B, 1994, 50 (10) :7155-7156

[2] INTERACTION OF SODIUM VAPOUR WITH SYNTHETIC SODALITE - SORPTION AND FORMATION OF COLOUR CENTRES [J].

BARRER, RM ;

COLE, JF .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1968, 29 (10) :1755-&

[3] An investigation of the electronic and optical properties of dehydrated sodalite fully doped with Na [J].

Blake, NP ;

Srdanov, VI ;

Stucky, GD ;

Metiu, H .

JOURNAL OF CHEMICAL PHYSICS, 1996, 104 (21) :8721-8729

[4] CONDUCTION-ELECTRON SPIN-RESONANCE OF NA-CS ALLOYS IN ZEOLITE-Y [J].

BLATTER, F ;

BLAZEY, KW ;

PORTIS, AM .

PHYSICAL REVIEW B, 1991, 44 (06) :2800-2802

[5] Dissolved alkali metals in zeolites [J].

Edwards, PP ;

Anderson, PA ;

Thomas, JM .

ACCOUNTS OF CHEMICAL RESEARCH, 1996, 29 (01) :23-29

[6]

ENGELHARDT G, 1996, J CHEM SOC CHEM COMM, P238

[7] CATHODOCHROMIC MATERIALS AND APPLICATIONS [J].

FAUGHNAN, BW ;

GOROG, I ;

HEYMAN, PM ;

SHIDLOVSKY, I .

PROCEEDINGS OF THE IEEE, 1973, 61 (07) :927-941

[8] CRYSTAL-STRUCTURES OF THE HYDRO-SODALITE NA6[ALSIO4]6.8H2O AND OF THE ANHYDROUS SODALITE NA6[ALSIO4]6 [J].

FELSCHE, J ;

LUGER, S ;

BAERLOCHER, C .

ZEOLITES, 1986, 6 (05) :367-372

[9] RELATION BETWEEN SPECIFIC HEAT AND SUSCEPTIBILITY OF AN ANTIFERROMAGNET [J].

FISHER, ME .

PHILOSOPHICAL MAGAZINE, 1962, 7 (82) :1731-&

[10] 1-1 CORRELATION BETWEEN AL-27 AND SI-29 CHEMICAL-SHIFTS AND CORRELATIONS WITH LATTICE STRUCTURES FOR SOME ALUMINOSILICATE SODALITES [J].

JACOBSEN, HS ;

NORBY, P ;

BILDSOE, H ;

JAKOBSEN, HJ .

ZEOLITES, 1989, 9 (06) :491-495

← 1 2 3 →