List
of
Publications of Julian Geshev, Ph.D. Instituto
de Física, Universidade Federal do Rio Grande do Sul, Porto
Alegre,
RS, Brazil
2009
G. M. B. Castro, J. Geshev,
J. E. Schmidt, E. B. Saitovich, and L. C. C. M. Nagamine, "Cone
magnetization state and exchange bias in IrMn/Cu/[Co/Pt]3 multilayers," Journal of Applied
Physics106 (2009) 113922. DOI
F. Rigato, J. Geshev, V. Skumryev, and
J. Fontcuberta, "The magnetization of epitaxial nanometric CoFe2O4(001)
layers," Journal of Applied
Physics106 (2009)
113924. DOI
R. Cichelero, L. G. Pereira, T. Dias,
J. E. Schmidt, C. Deranlot, F. Petroff, and J. Geshev, "Engineering double-shifted hysteresis loops in
Co/IrMn/Cu/Co films," Applied Physics Letters95 (2009) 112501. DOIM. Cougo dos Santos, J. Geshev,
L. G. Pereira, and J. E. Schmidt, "Magnetic-field-dependent morphology
of
self-organized Fe on stepped Si(111) surfaces," Journal of Applied
Physics106
(2009) 023904. DOIJ. Geshev, 'Comment on "Exchange
bias in the layered cobaltite Sr1.5Pr0.5CoO4",'
Journal
of Applied
Physics105 (2009) 066108. DOI
J. Geshev,
S. Nicolodi, R. B. da Silva, J. Nogués, V. Skumryev, and M. D.
Baró, "Discrimination between coupling and anisotropy fields in
exchange-biased bilayers," Journal of Applied
Physics105(5) (2009) 053903. DOI
J. Geshev, "Comment on 'Particle
size dependent exchange bias and cluster-glass states in LaMn0.7Fe0.3O3',"
Journal of Physics: Condensed Matter21 (2009) 078001. DOI
2008
D. Schafer, J. Geshev, S.
Nicolodi, L. G. Pereira, J. E. Schmidt, and P. L. Grande, "Controlled rotation of the exchange-bias direction in
IrMn/Cu/Co via ion irradiation," Applied Physics Letters93 (2008) 042501. DOIJ. Geshev, 'Comment
on "Cluster glass induced exchange biaslike effect in the perovskite
cobaltites" [Appl. Phys. Lett. 90, 162515 (2007)],' Applied Physics Letters93 (2008) 176101. DOIJ. Geshev,
S. Nicolodi, L. G. Pereira, J. E. Schmidt, V. Skumryev,
S. Suriñach, and M. D. Baró, "Impact of magnetization
easy-axis distributions on the ferromagnet-antiferromagnet exchange
coupling estimation," Physical
Review B77 (2008) 132407. DOIL. C. C. M. Nagamine, G. M. B. Castro, J.
Geshev, M. N. Baibich, E. B. Saitovitch, and J. E. Schmidt, "Magnetoresistance and magnetization studies through a
Cu interlayer in spin valves of NiFe/Cu/NiFe/FeMn," Journal of Magnetism and Magnetic
Materials320 (2008) e16. DOII. L. Graff, J. Geshev, S. R. Teixeira, L.
Amaral, and A. Traverse, "Atomic level
mixing induced by Kr irradiation of FeCo/Cu multilayers," Journal of Applied
Physics103 (2008) 033505. DOI J. Geshev, L. G. Pereira, and V. Skumryev, 'Comment on "Exchange Bias Dependence on Interface Spin
Alignment in a Ni80Fe20/(Ni,Fe)O Thin Film'',' Physical Review Letters100 (2008) 039701. DOIL. C. C. M. Naganime, J. Geshev, J.
B. M. da Cunha, A. Biondo, E. B. Saitovitch, "Magnetic anisotropy of
the ultrathin Fe layers in Fe/NiFe/Fe/Cu multilayers and their effect
to the magnetoresistance," Thin Solid Films516 (2008) 1279. DOIJ. Geshev, 'Comment on "Exchange bias and vertical shift in CoFe2O4
nanoparticles" [J. Magn. Magn. Mater. 313 (2007) 266],' Journal of Magnetism and Magnetic
Materials320 (2008) 600. DOI
2007
G.
Goev, V. Masheva, M. Mikhov, and J. Geshev, "Irreversible
susceptibility of initial magnetization curve
defined by energy consideration," International
Journal of Modern Physics B21(21) (2007) 3707. DOIJ. Geshev,
S. Nicolodi, L. G. Pereira, L. C. C. M. Nagamine, J. E. Schmidt, C.
Deranlot, F. Petroff, R. L. Rodríguez-Suárez, and A.
Azevedo, "Exchange bias through a Cu interlayer in IrMn/Co system," Physical
Review B75 (2007) 214402. DOIS.
Nicolodi, L. C. C. M. Nagamine, A. D. C. Viegas, J. E. Schmidt, L. G.
Pereira, C. Deranlot, F. Petroff, and J. Geshev, "Copper
spacer thickness dependence of the exchange bias in
IrMn/Cu/Co ultrathin films," Journal of Magnetism and Magnetic
Materials316 (2007) e97. DOIG.
Goev, V. Masheva, J. Geshev and M.
Mikhov, "Irreversible susceptibility of initial magnetization
curve," AIP Conference
Proceedings899(1) (2007) 251. DOII.
L. Graff, A. Traverse, J. Geshev
S. R. Teixeira, and L. Amaral, "Magnetic and structural
behavior of FeCo/Cu multilayers submitted to Kr irradiation,"
Nuclear
Instruments and Methods in Physics ResearchB257 (2007) 424.DOIP. Migowski, S. R.Teixeira, G. Machado, M. C. M. Alves, J. Geshev
and J. Dupont, "Structural and Magnetic Characterization of
Ni Nanoparticles Synthesized in Ionic Liquids," Journal
of Electron Spectroscopy and Related Phenomena156-158 (2007) 195. DOI
2006
L.
C. C. M. Nagamine, J. E. Schmidt, M. N. Baibich, E. B. Saitovitch, and J. Geshev,
"Field-dependent anisotropic magnetoresistance and
magnetization measurements of NiFe/FeMn exchange-biased
bilayers," Physica
B: Condensed Matter384(1-2)
(2006) 132. DOIJ.
G. Borges, P. Prod’homme, F. Maroun, R. Cortès, J. Geshev,
J. E. Schmidt, and P. Allongue, "Perpendicular anisotropy in
electrodeposited Au/Co films," Physica
B: Condensed Matter384(1-2) (2006) 138. DOI
S.
Nicolodi, L. G. Pereira, J. E. Schmidt, L. C. C. M. Nagamine, A. D. C.
Viegas, C. Deranlot, F. Petroff, and J. Geshev, "Angular
dependence of the exchange bias and coercivity of
IrMn/Co bilayers," Physica
B: Condensed Matter384(1-2)
(2006) 141. DOIJ. Geshev,
M. Cougo dos Santos, L. F. Zagonel, L. G. Pereira, and J. E. Schmidt, "Magnetization
switching in vicinal (111) iron and
cobalt thin films," Physica
B: Condensed Matter384(1-2)
(2006) 135. DOI
2005
M. Carara, K.D. Sossmeier, A.D.C. Viegas, J. Geshev, H. Chiriac,
and R.L. Sommer, "Study of CoFeSiB glass-covered amorphous
microwires under applied stress," Journal of Applied
Physics98(3), (2005) 033902.
DOIE. Fonda, S. R. Teixeira, J. Geshev,
D. Babonneau, F. Pailloux, and A. Traverse, "Negative differential
magnetization in Ni nanoparticles embedded in Al," Physical Review B71(18),
(2005) 184411. DOIL. C. C. M.
Nagamine, J. Geshev,
T. Menegotto, A. A. R. Fernandes, A. Biondo, and E. B. Saitovitch, “Ferromagnetic
resonance and magnetization studies in exchange-coupled NiFe/Cu/NiFe
structures,“ Journal of Magnetism and Magnetic Materials288, (2005) 205. DOI
2004
M. Cougo dos Santos, J. Geshev,
L.G. Pereira, M.
C. M. Alves, J. E. Schmidt, and P. Allongue, “Intralayer
coupling in self-organized Fe nanoclusters grown on vicinal
Si(111),“ Physical
Review B70(10), (2004)
104420. DOIJ. Geshev, L. G. Pereira, and J.
E. Schmidt, “Comment on "Thickness dependence of exchange bias
and coercivity in a ferromagnetic layer coupled with an
antiferromagnetic layer" [J. Appl. Phys.94, 2529 (2003)],“ Journal
of Applied Physics96(3), (2004) 1763. DOIC. Driemeier, L. C. C. M. Nagamine, J.
E. Schmidt, and
J. Geshev,“Tuning the Antiferromagnetic Easy Axis
Direction in Exchange Bias Bilayers,“
Journal of Magnetism and Magnetic Materials272-276S (2004) E811. DOIA. Staneva, E. Gattef, Y. Dimitriev, M.
Mikhov, and J.
Geshev, “Magnetic materials containing LaSr manganite
phase,“
Solid
State Sciences6(1), (2004) 47. DOI
2003
M. Cougo dos Santos, J. Geshev,
D. K. Silva,
J. E. Schmidt, L. G. Pereira, R. Hubler, P. Allongue, “Strong
dependence of the Fe thin film magnetic anisotropy on the Si(111)
substrate preparation,“ Journal
of Applied Physics94(3), (2003) 1490. DOIJ. Geshev, L.G. Pereira, J.E.
Schmidt, L.C.C.M.
Nagamine, E. B. Saitovitch, and F. Pelegrini,
“Frequency dependent exchange bias in NiFe/NiO films,“ Physical Review B67(13), (2003) 132401. DOI
2002
J. Geshev, L.G. Pereira and J.E.
Schmidt, “Rotatable anisotropy and coercivity in exchange-bias
bilayers,“ Physical
Review B66(13), (2002) 134432. DOIJ. Geshev, L.G. Pereira and J.E.
Schmidt,
“Dependence of the ferromagnetic resonance modes on the coupling
strength in exchange-coupled trilayer structures,“ Physica B 320(1-4), (2002)
169. DOIM.A.S. Boff, J. Geshev,
J.E. Schmidt, W.H. Flores, A.B. Antunes, M.A. Gusmão, and S.R.
Teixeira, “Bias dependence of magnetoresistance in Fe-Al2O3
granular thin films,“ Journal
of Applied Physics91(12), (2002) 9909. DOI
2001
J. Geshev, L.G. Pereira, J.E.
Schmidt and M. Mikhov, “Dependence of the magnetization and
remanence of single domain particles on the second cubic anisotropy
constant,“ Journal of Applied
Physics90(12),
(2001) 6243. DOIJ. Geshev, L.G. Pereira and J.E.
Schmidt, “Angular dependence of the exchange bias obtained from
magnetization and ferromagnetic resonance measurements in
exchange-coupled bilayers,“ Physical Review B64,
(2001) 184411. DOIJ. Geshev, A. Morrone and
J.E. Schmidt,
"Multi-state perpendicular remanence in Co/Pd multilayers," Journal of Magnetism and Magnetic Materials,
226-230, (2001) 1711. DOI
2000
J. Geshev, “Analytical
solutions for exchange bias and coercivity in
ferromagnetic/antiferromagnetic bilayers,“ Physical Review B,
62(9), (2000) 5627. DOI M. Cougo dos Santos, J. Geshev,
J.E. Schmidt, S.R. Teixeira and L.G. Pereira, “Origin of the
Magnetization Reversal of an Fe Thin Film on Si(111),“ Physical Review B
61(2), (2000) 1311. DOI
1999
J. Geshev, M. Mikhov and J.E.
Schmidt, “Remanent Magnetization Plots of Fine Particles with
Competing Cubic and Uniaxial Anisotropies,“Journal of Applied
Physics85(10), (1999) 7321. DOIJ. Geshev, A.D.C. Viegas and J.E. Schmidt, “
Unusual Remanent Magnetization of Granular Co/Cu,“ Journal of Magnetism and Magnetic Materials196
(1), (1999) 126. DOIV. Masheva,
M. Grigorova, N. Valkov, H.J. Blythe, T. Midlarz, V. Blaskov, J.
Geshev and M. Mikhov , “On the Magnetic Properties of
Nanosized CoFe2O4,“Journal of Magnetism and Magnetic Materials
196(1), (1999) 128. DOI J. Geshev, Ll. Martinez, J.S.
Muñoz, J.E. Schmidt and M. Mikhov, “Evaluation of the
Anisotropy Field for Fine-Particle Systems from Low-Field
Thermomagnetic Curves,” IEEE Transactions on Magnetics35(2), (1999)
1019. DOI
1998
J.
Geshev, A.D.C. Viegas and J.E. Schmidt,
“Negative Remanent Magnetization of Fine Particles with Competing
Cubic and Uniaxial Anisotropies,“ Journal of Applied
Physics84(3), (1998) 1488. DOI W.H.
Flores, S.R. Teixeira, J. Geshev, J.B.M. da Cunha, P.J.
Schilling, A. Traverse and M.C. Martins Alves, “Structural
Evolution and Magnetic Behaviour of Co/Ag Multilayers Submitted to
Thermal Annealing,“ Journal of Magnetism and Magnetic Materials188(1-2),
(1998) 17. DOI A.D.C. Viegas, J. Geshev, J.E. Schmidt and E.F.
Ferrari, “Giant Magnetoresistance and Remanence in Granular CoCu
Codeposited films,“Journal of Applied Physics83(11),
(1998) 7007. DOI
1997
A.D.C. Viegas, J. Geshev, L.S. Dorneles, J.E.
Schmidt and M. Knobel, “Correlation Between Magnetic Interactions
and Giant Magnetoresistance in Melt-Spun Co10Cu90
Granular Alloys,“ Journal of Applied Physics82(6),
(1997) 3047. DOI A.D.C. Viegas, J. Geshev, L.F. Schelp and J.E.
Schmidt, “Correlation Between Giant Magnetoresistance and
Magnetic Interactions in a CoAg Multilayered/Granular System,“ Journal of Applied
Physics 82(5), (1997) 2466. DOIJ. Geshev,
L. Bozukov, J.M.D. Coey and M. Mikhov, “Hysteresis of Ball-Milled
TbFe2 Fine Particles,“ Journal of Magnetism and Magnetic Materials170,
(1997) 219. DOIJ. Geshev and J.E. Schmidt, “Interaction Fields
Evaluation in Fine Particle Systems,“ IEEE Transactions on Magnetics 33(4),
(1997) 2504. DOI A.D.C. Viegas, J. Geshev, L.S. Dorneles, J.E.
Schmidt and M. Knobel, “Giant Magnetoresistance and Magnetic
Interactions in Granular Co10Cu90,“
in: Magnetic Hysteresis in Novel
Magnetic Materials, Ed. G.C.
Hadjipanayis, (Kluwer Academic Publishers, Dordrecht, The Netherlands,
1997). NATO ASI Series E: Applied Sciences, vol. 338,
pp. 413.
1995
V. Masheva, J. Geshev and M. Mikhov, “The
Influence of the Second Anisotropy Constant on the Fourier Description
of Hysteresis Loops for a Stoner-Wohlfarth System,“ Journal of Magnetism and Magnetic Materials140-144,
(1995) 371. DOI
1994
V. Masheva, J. Geshev and M. Mikhov, “Fourier
Analysis of Magnetization Curves,“ Proc. Suppl. Balkan Physics Letters2, (1994) 522-526.
J. Geshev, M. Mikhov and C. Sorensen, “Hopkinson
Effect in Fine Particle Systems with Cubic Anisotropy,“ Proc.
Suppl. Balkan Physics Letters2, (1994) 330-333.
V. Masheva, J. Geshev and M. Mikhov, “Fourier
Analysis of Hysteresis Loops and Initial Magnetization Curves.
Application to the Singular-Point-Detection Method,“ Journal of Magnetism and Magnetic Materials137,
(1994) 350, DOI M. Mikhov, J. Geshev and V. Masheva,
“Anisotropy Field and Interparticle Interactions Determined by
Fourier Analysis of Magnetization Curves of Small Particles,“ in:Nanophase Materials, Eds. G.C. Hadjipanayis and R.W. Siegel, (Kluwer
Academic Publishers, Dordrecht, The Netherlands, 1994) NATO ASI
Series E: Applied Sciences, vol. 260, pp. 699-702.
J. Geshev, V. Masheva and M. Mikhov,
“Interaction Effects Detected by Fourier Analysis of Hysteresis
Loops and Initial Magnetization Curves,“ IEEE Transactions on Magnetics30(2),
(1994) 863. DOI
1992
J. Geshev, O. Popov, M. Mikhov, J.L. Sanchez Ll., N.
Suarez and F. Leccabue, “The Hopkinson Effect in a Fine BaFe12O19
Particle System: Demagnetization Field Effects,“ Journal of Magnetism and Magnetic Materials117,
(1992) 190. DOIJ.
Geshev and M. Mikhov, “Remanence Curves for a
Disordered System of Three- and Four-Axial Fine Particles. Henkel-Type
Plots,“ Journal of Magnetism and Magnetic Materials104-107,
(1992) 1569. DOI
1990
J.
Geshev, O. Popov, V. Masheva and M. Mikhov,
“Thermomagnetic Curves for a Disordered System of Single Domain
Ferromagnetic Particles with Cubic Anisotropy,“ Journal of Magnetism and Magnetic Materials92,
(1990) 185. DOI