scholarly journals Magnetic exchange force microscopy: theoretical analysis of induced magnetization reversals

Nanoscale ◽  
2017 ◽  
Vol 9 (35) ◽  
pp. 13320-13325 ◽  
Author(s):  
Aleksei Ivanov ◽  
Pavel F. Bessarab ◽  
Valery M. Uzdin ◽  
Hannes Jónsson
Keyword(s):  
Magnetic Field ◽  
Theoretical Analysis ◽  
Exchange Interaction ◽  
Theoretical Calculations ◽  
Exchange Force ◽  
Magnetic Exchange ◽  
Force Microscopy ◽  
Magnetic States

In magnetic exchange force microscopy a magnetic tip is scanned over the surface of a solid and an image representing the exchange interaction recorded. Theoretical calculations are presented showing how lifetime of the magnetic states depends on tip size, distance and magnetic field.

Theoretical Study of the Exchange Interaction and the Exchange Force between Fe Films: Feasibility of Exchange Force Microscopy

1998 ◽  
Vol 37 (Part 1, No. 12A) ◽  
pp. 6575-6579 ◽  
Author(s):  
Kohji Nakamura ◽  
Tamio Oguchi ◽  
Hideo Hasegawa ◽  
Kazuhisa Sueoka ◽  
Kazunobu Hayakawa ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Theoretical Study ◽  
Exchange Force ◽  
Force Microscopy

Spin-selective Imaging by Magnetic Exchange Force Microscopy Using Ferromagnetic Resonance

Microscopy ◽  
2014 ◽  
Vol 63 (suppl 1) ◽  
pp. i11.2-i11
Author(s):  
Yasuhiro Sugawara ◽  
Eiji Arima ◽  
Yoshitaka Naitoh ◽  
Yan Jun Li
Keyword(s):  
Ferromagnetic Resonance ◽  
Exchange Force ◽  
Magnetic Exchange ◽  
Force Microscopy

Observation of Ferromagnetic Resonance in Magnetic Exchange Force Microscopy (MExFM)

2014 ◽  
Vol 609-610 ◽  
pp. 1392-1397
Author(s):  
Yun Bo Shi ◽  
Hui Xue ◽  
Zong Min Ma ◽  
Huan Zhang ◽  
Jun Tang ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Ferromagnetic Resonance ◽  
Resonance Effect ◽  
High Sensitivity ◽  
Magnetic Feature ◽  
Spin Interaction ◽  
Exchange Force ◽  
Magnetic Exchange ◽  
Force Microscopy ◽  
Irradiation Device

The atomic spin interaction is very important for understanding the superficially magnetic feature of nanostructure at atomic level. Magnetic exchange force microscopy (MExFM) is an innovative means of measuring surface spin force. But it is difficult to separate the surface topography and spin information. We develop the magnetic exchange force microscopy using ferromagnetic resonance (FMR-MExFM). The theoretical and experimental results demonstrate that this method can separate the two kinds of information effectively. Here, in order to obtain the high sensitivity in detecting the ferromagnetic resonance, we fabricate the microwave irradiation device to optimize the position between the device and the cantilever. We have succeeded in observing the ferromagnetic resonance effect and determining its resonant frequency using the homemade microwave irradiation device and the network analyzer. This research is very important for developing FMR-MExFM and novel magnetic sensor, detecting the magnetic information, etc.

Half-Integer Spin Molecular Nanomagnets

2002 ◽  
Vol 746 ◽  
Author(s):  
David N. Hendrickson ◽  
George Christou ◽  
Wolfgang Wernsdorfer ◽  
Stephen O. Hill ◽  
Núria Aliaga-Alcade ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Exchange Interaction ◽  
Single Molecule ◽  
Ground State ◽  
Exchange Interactions ◽  
Transverse Component ◽  
Zero Field ◽  
Magnetic Exchange ◽  
Integer Spin ◽  
Half Integer

ABSTRACTSingle-molecule magnets (SMM) are molecules that function as single-domain nanomagnets. SMMs have been characterized with a ground-state spin ranging from S = 4 to S = 13. A few SMMs have been identified that have half-integer spin ground states. [Cation][Mn12O12(O2CR)16(H2O)4] complexes, where R is some substituent, are SMMs that have either a S = 19/2 or 21/2 ground state. Quantum tunneling of magnetization (QTM) is observed for these half-integer-spin Kramers [Mn12]- degenerate SMMs in zero external magnetic field, as well as for a class of S = 9/2 Mn4 SMMs. The presence of QTM in zero external field is attributed to a transverse component of a nuclear spin field, dipolar interactions and intermolecular exchange interactions. The Landau-Zener method is used to measure the tunnel splitting as a function of transverse magnetic field for a single crystal of the S = 9/2 SMM [Mn4O3(OSiMe3)(OAc)3(dbm)3]. Spin parity dependent QTM is established. The effect of a magnetic exchange interaction between two S = 9/2 Mn4 SMMs upon QTM was studied for another compound. The hydrogen bonding and Cl…Cl contacts within a supramolecularly linked [Mn4]2 dimer lead to a weak antiferromagnetic exchange interaction between the two S = 9/2 SMMs. This interaction causes a shift (exchange bias) from zero field for the magnetic field at which QTM occurs.

Magnetic exchange force microscopy with atomic resolution

Nature ◽  
2007 ◽  
Vol 446 (7135) ◽  
pp. 522-525 ◽  
Author(s):  
Uwe Kaiser ◽  
Alexander Schwarz ◽  
Roland Wiesendanger
Keyword(s):  
Atomic Resolution ◽  
Exchange Force ◽  
Magnetic Exchange ◽  
Force Microscopy

Magnetic Exchange Force Microscopy

2009 ◽  
pp. 275-286
Author(s):  
Alexander Schwarz ◽  
Uwe Kaiser ◽  
Rene Schmidt ◽  
Roland Wiesendanger
Keyword(s):  
Exchange Force ◽  
Magnetic Exchange ◽  
Force Microscopy

scholarly journals Probing the Nano-Skyrmion Lattice on Fe/Ir(111) with Magnetic Exchange Force Microscopy

2017 ◽  
Vol 119 (4) ◽  
Author(s):  
Josef Grenz ◽  
Arne Köhler ◽  
Alexander Schwarz ◽  
Roland Wiesendanger
Keyword(s):  
Exchange Force ◽  
Magnetic Exchange ◽  
Force Microscopy
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