OBSERVATION OF THE FREEZING LINE IN A DEUTERON GLASS

被引:79
作者
KUTNJAK, Z
PIRC, R
LEVSTIK, A
LEVSTIK, I
FILIPIC, C
BLINC, R
KIND, R
机构
[1] JOZEF STEFAN INST,LJUBLJANA 61111,SLOVENIA
[2] ETH ZURICH,INST QUANTENELECKTR,CH-8093 ZURICH,SWITZERLAND
来源
PHYSICAL REVIEW B | 1994年 / 50卷 / 17期
关键词
D O I
10.1103/PhysRevB.50.12421
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The phase diagram of the deuteron glass Rb1-x(ND4)xD2PO4 has been determined experimentally in the entire range of concentration x. A recently introduced temperature-frequency plot has been used to analyze the shape of the dielectric relaxation spectrum, indicating that in the glassy regime the longest relaxation time diverges according to the Vogel-Fulcher law. The corresponding Vogel-Fulcher temperature has been identified as the static limit of the freezing temperature Tf. The phase boundaries of the ferroelectric and antiferroelectric phases have been obtained in a standard manner by observing the peaks and breaks, respectively, in the temperature dependence of the quasistatic dielectric constant. It is shown that in a broad concentration range the observed phase diagram can be quantitatively described by a mean-field theory based on the static random-bond random-field model of dipolar glasses. The absence of macroscopic polarization in the ferroelectric region close to the glassy phase is probably due to the formation of microdomains in the presence of local random fields, however, recent NMR data suggest that a phase segregation between ferroelectric and glassy regions may occur. © 1994 The American Physical Society.
引用
收藏
页码:12421 / 12428
页数:8
相关论文
共 21 条
[1]   LOCAL-POLARIZATION DISTRIBUTION IN DEUTERON GLASSES [J].
BLINC, R ;
DOLINSEK, J ;
PIRC, R ;
TADIC, B ;
ZALAR, B ;
KIND, R ;
LIECHTI, O .
PHYSICAL REVIEW LETTERS, 1989, 63 (20) :2248-2251
[2]   P-31 NMR SPIN-LATTICE RELAXATION - STRUCTURAL GLASS DYNAMICS IN RB1-X(ND4)XD2PO4 [J].
CHEN, SH ;
AILION, DC ;
LAICHER, G .
PHYSICAL REVIEW B, 1993, 47 (06) :3047-3052
[3]   SCALING DIELECTRIC DATA ON RB1-X(NH4)XH2PO4 STRUCTURAL GLASSES AND THEIR DEUTERATED ISOMORPHS [J].
COURTENS, E .
PHYSICAL REVIEW B, 1986, 33 (04) :2975-2978
[4]  
Courtens E., 1987, Ferroelectrics, V72, P229, DOI 10.1080/00150198708017948
[5]   COMPETING STRUCTURAL ORDERINGS AND TRANSITIONS TO GLASS IN MIXED-CRYSTALS OF RB1-X(NH4)XH2PO4 [J].
COURTENS, E .
JOURNAL DE PHYSIQUE LETTRES, 1982, 43 (06) :L199-L204
[6]   STABILITY OF SHERRINGTON-KIRKPATRICK SOLUTION OF A SPIN GLASS MODEL [J].
DEALMEIDA, JRL ;
THOULESS, DJ .
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1978, 11 (05) :983-990
[7]   THEORY OF SPIN GLASSES [J].
EDWARDS, SF ;
ANDERSON, PW .
JOURNAL OF PHYSICS F-METAL PHYSICS, 1975, 5 (05) :965-974
[8]  
FEIGELMAN MV, 1985, J PHYS LETT-PARIS, V46, pL695, DOI 10.1051/jphyslet:019850046015069500
[9]   ORIENTATIONAL GLASSES [J].
HOCHLI, UT ;
KNORR, K ;
LOIDL, A .
ADVANCES IN PHYSICS, 1990, 39 (05) :405-615
[10]   SOFT MODE, RELAXOR, AND GLASSY-TYPE DYNAMICS IN THE SOLID-SOLUTION RB1-X(ND4)XD2PO4 [J].
KORNER, N ;
PFAMMATTER, C ;
KIND, R .
PHYSICAL REVIEW LETTERS, 1993, 70 (09) :1283-1286