Effect of La–CO substitution on the crystal structure and magnetic properties of low temperature sintered Sr1−La Fe12−Co O19 (x=0–0.5) ferrites

AbstractThe reaction of (NH4)2[Ce(NO3)6 ] with two equivalents of OPPh3(Ph = C6H5 ) in acetonitrile yields Ce(NO3 ) 4(OPPh3 )2 (1) in high yield, whereas using acetone as solvent affords mer- Ce(NO3 )3(OPPh3)3 • 2(CH3)2CO (2), the yield of which is dependent on the reaction time. A crystal structure determination of 2 shows that the Ce atom is coordinated with three bidentate nitrato groups and three OPPh3 ligands, thus achieving a coordination number of nine. Eight non-coordinating acetone molecules are present in the unit cell. Crystal data (292 K): space group P21/n (no. 14), 0=12.438(2), b = 25.532(4), c = 20.379 (4) Å, β = 96.33(2)°, V = 6432(1) , Z = 4, dcalc = 1.318 g em 3. Due to poor crystal quality the refinement converges at R = 0.11, Rw = 0.09. 2 is paramagnetic, but it does not follow the Curie-Weiss law at low temperature. Therefore crystal field theory was used in order to explain these findings.

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MAGNETIC PROPERTIES OF R2In (R=Gd, Tb, Er)

International Journal of Modern Physics B ◽

10.1142/s0217979293001736 ◽

1993 ◽

Vol 07 (01n03) ◽

pp. 818-821 ◽

Cited By ~ 5

Author(s):

D. RAVOT ◽

O. GOROCHOV ◽

T. ROISNEL ◽

G. ANDRE ◽

F. BOUREE-VIGNERON ◽

...

Keyword(s):

Crystal Structure ◽

Magnetic Properties ◽

Magnetic Susceptibility ◽

Rare Earth ◽

Low Temperature ◽

Neutron Diffraction ◽

Antiferromagnetic State ◽

Powder Neutron Diffraction ◽

Magnetic Transport ◽

The Rare Earth

For all the Rare-Earth (R) the R2In form in the same crystal structure (P63/mmc). These compounds show a great variety of magnetic behaviors. When the temperature decreases, the magnetic susceptibility of Er2InTb2In and Gd2In increases, passes through a maximum then decreases. For Gd2In this behavior was associated with change from a paramagnetic to a ferromagnetic then to an antiferromagnetic state. We have performed magnetic, transport (Tb, Er), Mössbauer spectroscopy (Er) and powder neutron diffraction experiments (Gd, Tb, Er) on these compounds. Unlike Gd2In the resistivity of Tb2In and Er2In does not reveal any anomaly at the temperature where the susceptibility begins to decrease and the Tb2In and Er2In magnetizations show the same behavior at all temperatures in the ordered region. Neutron diffraction experiments reveal ferromagnetic and antiferromagnetic structures at low temperature.

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Effect of La–Co substitution on the crystal structure and magnetic properties of hot press sintered Sr1−La Fe12−Co O19 (x=0−0.5) ferrites for use in LTCC technology

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2015.05.007 ◽

2015 ◽

Vol 391 ◽

pp. 136-139 ◽

Cited By ~ 10

Author(s):

Long Peng ◽

Lezhong Li ◽

Rui Wang ◽

Yun Hu ◽

Xiaoqiang Tu

Keyword(s):

Crystal Structure ◽

Magnetic Properties ◽

Hot Press ◽

Co Substitution

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Low-Temperature Structure and Magnetic Properties of Tetraphenylarsonium Tetrachloronitridotechnetate(VI)

Australian Journal of Chemistry ◽

10.1071/ch9960633 ◽

1996 ◽

Vol 49 (5) ◽

pp. 633 ◽

Cited By ~ 4

Author(s):

BN Figgis ◽

PA Reynolds ◽

FK Larsen ◽

GA Williams ◽

CD Delfs

Keyword(s):

Crystal Structure ◽

Magnetic Properties ◽

Low Temperature ◽

Neutron Diffraction ◽

Single Crystals ◽

Temperature Structure ◽

X Ray Diffraction ◽

Magnetic Susceptibilities ◽

Space Group ◽

X Ray

The crystal structure of [As(C6H5)4] [TcNCl4] was determined at 120 K by X-ray diffraction and at 28 K by neutron diffraction. The crystals are tetragonal, space group P4/n, with a 1260.4(3) and c 773.2(2) pm at 120 K. The [TcNCl4]-anion possesses exact C4v symmetry, with Tc≡N distances of 160.3(2) and 162.5(4)pm at 120 and 28 K respectively. Magnetic susceptibilities were measured on single crystals from 300 to 4.5 K. The results indicate a well behaved S ½ system following the Curie-Weiss law with θ -0.13 K

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