N-14 NUCLEAR-QUADRUPOLE-RESONANCE STUDY OF THE STRUCTURAL PHASE-TRANSITIONS IN NH4SCN

被引：17

作者：

BLINC, R ^{[1
]}

SELIGER, J ^{[1
]}

ZAGAR, V ^{[1
]}

APIH, T ^{[1
]}

DOLINSEK, J ^{[1
]}

WARHANEK, H ^{[1
]}

FUITH, A ^{[1
]}

SCHRANZ, W ^{[1
]}

机构：

[1] UNIV VIENNA, INST EXPTL PHYS, A-1090 VIENNA, AUSTRIA

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.42.8125

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The SCN- and NH4+ nitrogen quadrupole coupling tensors have been determined in the tetragonal, orthorhombic, and monoclinic phases of NH4SCN. The high-temperature, tetragonal phase is dynamically disordered with the hydrogen-bonded NH4+ ions moving between four equivalent off-center sites in the a-b plane in response to the correlated head-tail flipping of the SCN- groups. In the orthorhombic phase, two out of the four NH4+ sites freeze out, so that this phase is partially ordered. The monoclinic phase is completely ordered with the NH4+ ions frozen into one of the two remaining off-center sites. © 1990 The American Physical Society.

引用

收藏

页码：8125 / 8132

页数：8

相关论文

共 10 条

[1] ANOMALOUS BEHAVIOR OF TEMPERATURE-DEPENDENCE OF N-14 NQR FREQUENCIES IN SODIUM, POTASSIUM, AND AMMONIUM THIOCYANATES [J].

ASAJI, T ;

IKEDA, R ;

NAKAMURA, D .

JOURNAL OF MAGNETIC RESONANCE, 1978, 31 (03) :437-443

[2] STRUCTURAL STUDY OF TETRAGONAL-ORTHORHOMBIC PHASE-TRANSITION IN NH4SCN [J].

HAMADA, A ;

YAMAMOTO, S ;

SHINNAKA, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1990, 59 (03) :954-958

[3] MELTING AND SOLID-SOLID TRANSITION-TEMPERATURES AT HIGH-PRESSURES FOR NH4SCN, RHSCN, TLSCN, AND CSSCN [J].

KLEMENT, W ;

PISTORIUS, CWFT .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1976, 49 (08) :2148-2153

[4] DYNAMIC TWINNING - POLYMORPHISM OF THALLIUM THIOCYANATE STUDIED WITH X-RAY-DIFFRACTION [J].

LIPPMAN, R ;

RUDMAN, R .

JOURNAL OF CHEMICAL PHYSICS, 1983, 79 (07) :3457-3461

[5] PSEUDOSPIN MODEL FOR KSCN [J].

SCHRANZ, W ;

WARHANEK, H ;

BLINC, R ;

ZEKS, B .

PHYSICAL REVIEW B, 1989, 40 (10) :7141-7149

[6] PROTON-N-14 DOUBLE-RESONANCE STUDY OF STRUCTURAL PHASE-TRANSITIONS IN PEROVSKITE TYPE LAYER COMPOUND (CH3NH3)2CDCL4 [J].

SELIGER, J ;

BLINC, R ;

AREND, H ;

KIND, R .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1976, 25 (02) :189-195

[7] NUCLEAR MAGNETIC DOUBLE-RESONANCE BASED ON STRONG RF MAGNETIC-FIELD-INDUCED COUPLING BETWEEN SPIN SYSTEMS [J].

SELIGER, J ;

BLINC, R ;

MALI, M ;

OSREDKAR, R ;

PRELESNIK, A .

PHYSICAL REVIEW B, 1975, 11 (01) :27-36

[8] RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN NH4SCN [J].

TEWARI, GD ;

KHANDELWAL, DP ;

BIST, HD .

JOURNAL OF CHEMICAL PHYSICS, 1985, 82 (12) :5624-5632

[9] X-RAY CRITICAL SCATTERING IN KSCN [J].

YAMAMOTO, S ;

SAKUNO, M ;

SHINNAKA, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1987, 56 (07) :2604-2605

[10]

ZAVODNIK VE, 1972, SOV PHYS-CRYSTALLOGR, V17, P1074