Oxygen Order, Stoichiometry and Magnetic Behavior of YBa2(Cu1−xFex)3O7+δ

1987 ◽  
Vol 99 ◽  
Author(s):  
C. W. Kimball ◽  
J. L. Matykiewicz ◽  
John Giapintzakis ◽  
Hsun Lee ◽  
B. D. Dunlap ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Neutron Diffraction ◽  
Spin Glass ◽  
Tetragonal Phase ◽  
Hyperfine Splitting ◽  
Magnetic Behavior ◽  
Total Oxygen ◽  
Total Oxygen Content ◽  
Oxygen Site ◽  
Magnetic Hyperfine Splitting

ABSTRACTMössbauer effect and neutron diffraction measurements have been made as a function of composition for YBa2(Cu1−xFex)3O7+δ. A chemically driven disordering of the sublattices is observed with increasing Fe concentration which results in a transition from the orthorhombic to a tetragonal phase. However, as the occupancy of the oxygen site 0(1) in the chain is depleted and the site of the ordered vacancy 0(5) between the chains becomes occupied, the total oxygen content is not reduced but remains near seven in contrast to behavior observed in the quenched tetragonal phases. Mössbauer spectra for x =0.05 at temperatures below 15K show magnetic hyperfine splitting which is characteristic of a spin glass; i.e., a distribution of magnetic fields. It is inferred from Mössbauer results that Fe preferentially occupies the Cu(1) site.

Single crystal neutron diffraction studies of antiferromagnets at low temperatures in applied magnetic fields

1959 ◽  
Vol 20 (2-3) ◽  
pp. 180-184 ◽  
Author(s):  
W.C. Koehler ◽  
M. K. Wilkinson ◽  
J.W. Cable ◽  
E.O. Wollan
Keyword(s):  
Magnetic Fields ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Low Temperatures

scholarly journals Exchange Bias in a Layered Metal–Organic Topological Spin Glass

2020 ◽  
Author(s):  
Ryan Murphy ◽  
Lucy Darago ◽  
Michael Ziebel ◽  
Elizabeth A. Peterson ◽  
Edmond W. Zaia ◽  
...  
Keyword(s):  
Spin Glass ◽  
Exchange Bias ◽  
Low Temperatures ◽  
2D Materials ◽  
Magnetic Behavior ◽  
Spin Frustration ◽  
Geometrically Frustrated ◽  
Spin Freezing ◽  
Metal Organic ◽  
Phase Chemistry

<p><b>The discovery of conductive and magnetic two-dimensional (2D) materials is critical for the development of next generation spintronics devices. Coordination chemistry in particular represents a highly versatile, though underutilized, route toward the synthesis of such materials with designer lattices. Here, we report the synthesis of a conductive, layered 2D metal–organic kagome lattice, Mn<sub>3</sub>(C<sub>6</sub>S<sub>6</sub>), using mild solution-phase chemistry. Strong geometric<i> </i>spin frustration in this system mediates spin freezing at low temperatures, which results in glassy magnetic behavior consistent with a geometrically frustrated (topological) spin glass. Notably, the material exhibits a large exchange bias of 1625 Oe, providing the first example of exchange bias in a coordination solid or a topological spin glass. More generally, these results demonstrate the potential utility of geometrically frustrated lattices in the design of new nanoscale spintronic materials.</b></p>

Magnetic behavior in theEr(Mn,Al)2system: Neutron diffraction study

2003 ◽  
Vol 68 (18) ◽  
Author(s):  
I. V. Golosovsky ◽  
A. I. Kurbakov ◽  
I. Mirebeau ◽  
A. S. Markosyan ◽  
I. Yu. Gaidukova
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Magnetic Behavior ◽  
Neutron Diffraction Study

Neutron diffraction study of the crystal structure of TlInSe2 at high pressure

2019 ◽  
Vol 33 (15) ◽  
pp. 1950149 ◽  
Author(s):  
N. T. Mamedov ◽  
S. H. Jabarov ◽  
D. P. Kozlenko ◽  
N. A. Ismayilova ◽  
M. Yu. Seyidov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Neutron Diffraction ◽  
Tetragonal Phase ◽  
Unit Cell Volume ◽  
Diffraction Method ◽  
Lattice Parameter ◽  
Neutron Diffraction Study ◽  
Pressure Derivative ◽  
Neutron Diffraction Method

We have investigated the crystal structure of strongly anisotropic semiconductor TlInSe2 by neutron diffraction method under high pressure upto P = 3.3 GPa. It was shown that the tetragonal phase of TlInSe2 crystal (the space group I4/mcm) is stable in the whole investigated range of pressure. The lattice parameters dependence of the pressure and the unit cell volume are obtained, the linear coefficients of compressibility and the bulk moduli are calculated. At the low pressure, obtained value of compressibility for the lattice parameter a is k[Formula: see text] = 14.23 × 10[Formula: see text] GPa[Formula: see text] and for c is k[Formula: see text] = 5.93 × 10[Formula: see text] GPa[Formula: see text]. Obtained values for bulk modulus B0 and its pressure derivative B[Formula: see text] in tetragonal phase are 30(7) GPa and 4(1), respectively.

Field-induced dynamic magnetic behaviour of a canted weak ferromagnetic chain material

2015 ◽  
Vol 2 (4) ◽  
pp. 403-408 ◽  
Author(s):  
Jun-Liang Liu ◽  
Guo-Zhang Huang ◽  
Ming-Liang Tong
Keyword(s):  
Magnetic Fields ◽  
Spin Glass ◽  
Magnetic Behaviour ◽  
Slow Relaxation ◽  
Spin Canting ◽  
Magnetic Chain ◽  
Ferromagnetic Chain ◽  
Weak Ferromagnetic

A 1-D [MnIII3O] based magnetic chain material amazingly exhibits the coexistence of spin-glass, spin-canting, and metamagnetic behaviours as well as slow relaxation of magnetization under different applied magnetic fields.

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