𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Crystallographic and Magnetic Properties of Cu2FeGeSe4 and Cu2FeGeTe4 Compounds

✍ Scribed by M. Quintero; R. Tovar; A. Barreto; E. Quintero; A. Rivero; J. Gonzalez; G. Sánchez Porras; J. Ruiz; P. Bocaranda; J. M. Broto; H. Rakoto; R. Barbaste

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
194 KB
Volume
209
Category
Article
ISSN
0370-1972

No coin nor oath required. For personal study only.

✦ Synopsis

X-ray powder diffraction measurements, at room temperature, and magnetic susceptibility c measurements, in the temperature range from 2 to 300 K, were made on polycrystalline samples of Cu 2 FeGeSe 4 and Cu 2 FeGeTe 4 magnetic semiconductor compounds. Magnetization measurements at 2, 4.2 and 77 K in magnetic fields up to 35 T were carried out on Cu 2 FeGeSe 4 compounds. From the analysis of the X-ray diffraction lines, it was found that Cu 2 FeGeSe 4 and Cu 2 FeGeTe 4 have, respectively, stannite and monoclinic structures. The resulting 1ac versus T curves showed that Cu 2 FeGeSe 4 is antiferromagnetic with a Ne  el temperature T N 20 K while Cu 2 FeGeTe 4 is ferrimagnetic with T N 160X1 K. The magnetization and susceptibility results obtained on Cu 2 FeGeSe 4 showed the presence of bound magnetic polarons (BMPs) in agreement with earlier studies made on this type of materials .

📜 SIMILAR VOLUMES

Electrical Properties of the Cu2FeGeSe4
Electrical Properties of the Cu2FeGeSe4 Compound
✍ G. Sánchez Porras; M. Quintero; R. Barrios; J. Gonzalez; R. TovarSánchez Porras; 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 162 KB 👁 2 views

The electrical transport properties of a polycrystalline sample of Cu 2 FeGeSe 4 magnetic semiconductor compound are studied in the temperature range between 100 and 300 K. From the analysis of the electrical data, the values of the activation energy E A , the density of states effective mass of the

Rational Design of Homo and Hetero Hexan
Rational Design of Homo and Hetero Hexanuclear Coordination Compounds: Syntheses and Magnetic Properties of [Cu2IIM4II] (M = Cu, Ni) Species and the Crystal Structure of {[Cu(tmen)(H2O)]2[Cu(tmen)]2[Cu2L](H2O)}(ClO4)4 · 2 H2O
✍ Ally Aukauloo; Xavier Ottenwaelder; Rafael Ruiz; Yves Journaux; Yu Pei; Eric Riv 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 488 KB 👁 2 views

New homo-and heterometallic hexanuclear complexes of formula {[Cu(tmen) tetrakis(aminomethylene)methanetetrakis(oxamic acid), tmen = N,N,NЈ,NЈ-tetramethylethylenediamine, pmdien = N,N,N',N',N''-pentamethyldiethylenetriamine, and cyclam = 1,4,8,11-tetraazacyclotetradecane] have been synthesized. The

Synthesis, Characterization, and Crystal
Synthesis, Characterization, and Crystal Structures of [Cu(ca2en)2]ClO4, and [Cu(ca2en)(PPh3)2]ClO4 Complexes
✍ Soraia Meghdadi; Mehdi Amirnasr; Kurt J. Schenk; Saeed Dehghanpour 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 German ⚖ 140 KB 👁 1 views

Synthesis, spectroscopy, and crystal structures of [Cu(ca 2 en) 2 ]ClO 4 (1) and [Cu(ca 2 en)(PPh 3 ) 2 ]ClO 4 (2) (ca 2 en N,N'-bis(trans-cinnamaldehyde)ethylenediimine) are reported. Compound 1 crystallizes in the orthorhombic space group Pbca, with a 12.5647( ), b 21.8203(11), c 27.992(2) ä, V 76