scholarly journals MAGNETIC PROPERTIES OF SINGLE CRYSTALS (MnIn2S4)1–х–(AgIn5S8)х SOLID SOLUTIONS

Doklady BGUIR ◽  
2019 ◽  
pp. 95-99
Author(s):  
I. V. Bodnar ◽  
Bin Tkhan Chan

Single crystals of solid solutions (MnIn2S4)1-х–(AgIn5S8)х have been grown with the Bridgeman method in the whole range of temperatures. The crystals structure and composition were determined. The study of the given single crystals in the temperature range 2–300 К and magnetic fields to 10 T was carried out. It is set that the given crystals are paramagnetic in the whole studied range. The specific magnetic moment increases with the temperature.  

2015 ◽  
Vol 233-234 ◽  
pp. 368-370
Author(s):  
Evgeniy V. Eremin ◽  
Nikita V. Volkov ◽  
Irina A. Gudim ◽  
Vladislav L. Temerov

Sm1-xLaxFe3(BO3)4(х = 0, 0.5, and 0.75) single crystals are grown by the flux method and their characteristics are investigated in the temperature range 5−300 K and magnetic fields of up to 9 T. It is established that substitution of nonmagnetic La3+ions for magnetic Sm3+ions increases the magnetic moment and weakens the magnetoelectric effect in Sm1-xLaxFe3(BO3)4.


2018 ◽  
Vol 60 (6) ◽  
pp. 1147
Author(s):  
И.А. Барабан ◽  
А.В. Емельянов ◽  
П.Н. Медведская ◽  
В.В. Родионова

AbstractThis work presents results of investigations of low temperature magnetic properties of microwires, fabricated by the Ulitovsky–Taylor method from Fe–Si–B alloy. Influence of the glass coating presence on the magnetostatic properties was shown at room temperature and at 2 K. Conclusions about the peculiarities of temperature dependence of the magnetic moment, measured in low and high magnetic fields (10 Oe–5 kOe) in the temperature range from 2 to 300 K for a sample with partially reduced fabricated processinduced stress by removing the glass, were made.


2011 ◽  
Vol 66 (11) ◽  
pp. 1097-1100 ◽  
Author(s):  
Larysa Shlyk ◽  
Rainer Niewa

Single crystals of the new barium hollandite Ba1.3Co1.3Ti6.7O16 were obtained from a BaCl2 flux (I2/m, Z = 1, a = 9.9470(4), b = 2.9714(2), c = 10.2260(5) Å , β = 90.906(2)◦). In the crystal structure piles of Ba atoms are situated within a framework of edge- and vertex-sharing octahedra (Co,Ti)O6. The composition was deduced from microprobe analyses, structure refinements and charge balance arguments in agreement with the observed magnetic properties. The temperature dependence of the magnetic susceptibility χ(T) of Ba1.3Co1.3Ti6.7O16 single crystals reveals paramagnetism down to 2 K. The value of the Co magnetic moment deduced from the Curie-Weiss law agrees well with the theoretical value of the high-spin state spin-only moment of μeff = 3.87 μB for Co2+ (S = 3/2)


2007 ◽  
Vol 52 (6) ◽  
pp. 308-311
Author(s):  
Kh. S. Bagdasarov ◽  
Yu. V. Shaldin ◽  
J. Warchulska ◽  
I. N. Tsigler

1997 ◽  
Vol 494 ◽  
Author(s):  
T. Kimura ◽  
Y. Tomioka ◽  
T. Okudat ◽  
H. Kuwahara ◽  
A. Asamitsu ◽  
...  

ABSTRACTAnisotropie charge transport and magnetic properties have been investigated for single crystals of the layered manganite, La2–2xMn2O7 (0.3≤x≤0.5). Remarkable variations in the magnetic structure as well as in the charge-transport properties are observed with changing doping-level x. A crystal with x=0.3 behaves like a 2-dimensional ferromagnetic metal in the temperature region between ∼90 K and ∼270 K, and shows the interplane tunneling magnetoresistance at lower temperatures. These characteristic charge-transport properties are attributed to the interplane magnetic coupling between the adjacent MnO2 bilayers, and are strongly affected by the application of pressure as well as low magnetic fields through the change in magnetic structure. With increase of the carrier concentration toward x=0.5, the charge-ordered phase is stabilized and dominates the charge transport and magnetic properties.


2004 ◽  
Vol 18 (30) ◽  
pp. 1543-1549
Author(s):  
ILEANA LUPSA

The magnetic measurements on U 1-x Y x MnAl system were performed in the 4–600 K temperature range and fields up to 70 kOe. YMnAl presents spin fluctuation characteristics due to manganese atoms with a Curie–Weiss type behavior over the T* temperature. The gradual substitution of uranium for yttrium leads to similar behavior evidencing higher molar Curie constants and supporting a contribution due to uranium atom. The effective magnetic moment on uranium positions is that of U 3+ ion (3.1μB) and is composition-independent. The spin fluctuating state of manganese is characterized by the effective magnetic moment of 3μB/ Mn atom. The intrinsic Mn moment order is discussed in the critical Mn – Mn separation term.


2003 ◽  
Vol 17 (22) ◽  
pp. 1181-1185 ◽  
Author(s):  
P. Lucaci ◽  
Ileana Lupsa

The magnetic properties of the U 1-x Y x NiAl system were studied in the 4–600 K temperature range fields up to 7 T. The systems with x≤0.8 were analyzed in terms of the spin fluctuations theory. The system presents a Curie–Weiss type behavior over a certain temperature T*. The paramagnetic Curie temperatures are negative and decrease in absolute magnitude as yttrium content increases. The effective magnetic moment per uranium atom is composition independent (≈3.1 μB) proving the presence of temperature induced spin fluctuations.


2012 ◽  
Vol 54 (2) ◽  
pp. 293-297 ◽  
Author(s):  
G. M. Abramova ◽  
G. A. Petrakovskii ◽  
D. A. Velikanov ◽  
A. M. Vorotynov ◽  
M. S. Molokeev ◽  
...  

1999 ◽  
Vol 14 (7) ◽  
pp. 2697-2700 ◽  
Author(s):  
Y. X. Li ◽  
S. X. Gao ◽  
J. Du ◽  
C. C. Tang ◽  
C. Cai ◽  
...  

The magnetic properties of single-crystalline Tb2Fe17−xSix (x = 0, 1, 2, 3, and 3.3) have been investigated. The Si substitution constricted the lattices by 1.5% and caused the Th2Ni17 transfer to Th2Zn17. The Curie temperature increased from 413 to 526 K, and the spontaneous magnetic moment decreased from 82.6 to 46.4 emu/g with the increase of Si. The stronger anisotropy and coercivity were generated by Si occupying the Fe sublattices. A domain wall pinning-dominated mechanism was responsible for increasing the coercivity force from 0.01 T (x = 1) to about 0.36 T (x = 3.3) at 1.5 K.


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